Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30c942b2a36643d…

MALICIOUS

PDF

79.9 KB Created: 2021-09-08 15:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c1a2076134f1681eff2cde11f8cc30cf SHA-1: 8c84d8fe5041cbc25a346faac74a4195b918ac6e SHA-256: c30c942b2a36643df8461c89684c8f8909d59b2ae815c14821ede2af6391c392
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous URLs, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=g502+hero+manual PDF link annotation
    • http://beerskiboot.de/img/upload/file/99552645819.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/jpo34et4h8kuqi1m1aj4d26h5k/talijojipusuxudujoda.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/zewukewet.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/diwoli.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130ff00e87af---9587763796.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16137d9a171b4f---74667545382.pdfIn PDF document text
    • http://yibetter.com/data/files/xovavofufubaxaw.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/besotijenubule.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/59366760589.pdfIn PDF document text
    • http://naturpix.ch/cmsimages/file/561204822.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/mezajisolapugus.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/47130539823.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef813b80ca---wisojopavijabusev.pdfIn PDF document text
    • https://soechi.id/userfiles/file/xaxokutijutatomaje.pdfIn PDF document text
    • http://hacsbathtarntaran.org/~/userfiles/file/64156366944.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/56234954903.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/29469877883.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/68103543407.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210906075220.pdfIn PDF document text
    • http://krupongs.com/images/file/vurobelexuraposaba.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/5691487357.pdfIn PDF document text
    • https://okazionche.com/files/tebuwifa.pdfIn PDF document text
    • http://aalzkj.love-mrt.com/upload/files/nefeninewabexorisufu.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/51387138389.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 10528 bytes
SHA-256: a27ff05db6170037138585582ba865674448cb7a207b8ba2e3a40875b7d79db5
font_02_sfnt_off0000f0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BD 22292 bytes
SHA-256: 1488c394b77c4b082a1984552342da0ca7b45cc6d874ea10a9eba829dfe65d1f
font_03_sfnt_off00012946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12946 1876 bytes
SHA-256: b0bc1818227271987c65e29963abad1b6173cba427e0f0f0b30db9b57a492c50

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