Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c8615564f15b6c…

MALICIOUS

PDF

82.1 KB Created: 2021-09-02 11:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2d13dc7c9600a44cc05699ed603ed7e0 SHA-1: 0925a33ea9339146628b5fab7c3d0b9eae717cfc SHA-256: f7c8615564f15b6c076fe4ecc6caa3747545e173bf9a4d33256f6db28fde151f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of a 'Callback phishing phone lure' heuristic suggests an attempt to trick users into calling fraudulent support numbers. ClamAV detection further confirms the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=meaning+of+the+word+proponent PDF link annotation
    • http://dfanchem.com/upload/files/nojigipojavufuta.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/togowirikesivupaxixib.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/c3fc2b47280214a9c19a0fd73fd1ec23/93540863189.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/eee43020a6aa5ae05a269a19a9f4386e/vamudomafagekir.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a016eb92707---suleluvozipujuwolato.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/xokusanemuliwapuleguv.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/o97bmfd91dlqu5sbaj7emu6o85/wilaxojuwajabonile.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210714060818171.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098960e82922---tevon.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/43342747865.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0080e80c8---11869245661.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901b377bb20---nuvupegoxok.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d426c91d51---97859842099.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/49759354584.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/568aaa95a9b821158b042ef61050a6ec/65534124621.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160dfdcedcb18a---xazimuxej.pdfIn PDF document text
    • http://geobrofab.com/clients/d/da/da7cd3953015cd63472398095fc1fcdd/File/wepimudesopogipokenowad.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/94396889482.pdfIn PDF document text
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/89168502075.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/45pe8raakfsj6drf07vko2bta3/jopazezozovox.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bae2b5d5d---67093120680.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/zedimaxipobaxuzizejop.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/9ffe3be01206ae163a7860b6f5620778/73179109966.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/38b6b4dd10f5aa9a7bc277d3336c7d26/fawulapufofenawebat.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/7982875415.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/renofedejevip.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4A 10644 bytes
SHA-256: 779d390b45cdaea4d605d1b9b31841a7f1906b0c27dbb79900ea4746e844c861
font_01_sfnt_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7F 22584 bytes
SHA-256: ec83bb31a40fd321c0487983ea0dea3edce89213df50da563c401084bcea6aa3

Open this report in the interactive analyzer, or submit your own file for analysis.