Malicious PDF — malware analysis report

Static analysis result for SHA-256 212299d5249c9f6f…

MALICIOUS

PDF

113.7 KB Created: 2021-09-06 22:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 76b7f8f26c6578fd06e5b17935c7cee8 SHA-1: 6fedf37ecdc7499463226f2a38f6a3daca3d513b SHA-256: 212299d5249c9f6f66b3cd17b4bf1c96655175b0309944923bfa634113c5ae7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF-specific heuristics and the nature of the URLs strongly suggest this file is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://www.koreayokogawa.com/ckfinder/userfiles/files/19008886763.pdf In PDF document text
    • https://avigailpekelman.com/sites/default/files/file/bidafej.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/u3h0j6behhh9p4292cb6f83pl0/11157238925.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745f200797a---sinevuwuda.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/12219063206.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/manogajowituk.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/guwenosaletojafogemizo.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/fepomoxuvezigiri.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b28645597f---tasoxizazesasoruwufufe.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/au4fjscbd6jn9kf9fmietgkdqc/makovuledem.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a22a09c7c8---fedulolidemiwufo.pdfIn PDF document text
    • https://hgb.se/filer/file/4786854192.pdfIn PDF document text
    • http://www.zaluziemalina.cz/userfiles/file/bekuv.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/tra0p3bh9aghqgfrsvgp21m59a/40361722253.pdfIn PDF document text
    • http://anninh247.info/upload/files/nisugoxisipunila.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/xanivazoduduvovikukivefe.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/45133509257.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/12414616607.pdfIn PDF document text
    • http://babamoleskine.com/files/file/gotaludapave.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/68889738584.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105292150a97---74907679344.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/8b59a1f92cda4ea2969f6850d590a5d6/diviz.pdfIn PDF document text
    • https://cape-electronics.com/media/file/woxivexotiliwegojawaravi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=islamabad+high+court+decision+on+khatam+e+nabuwat+pdfPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001531a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1531A 19336 bytes
SHA-256: 43ea4b6fdd1b03ef06b05dbb90433b3dcb8db242d0ea0049edb6b1f997853c2e
font_01_sfnt_off00018659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E70 11436 bytes
SHA-256: 97f6c7508ef6d1fbd7126870540224b08a72a9df091958819f206903b2246632

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