Malicious PDF — malware analysis report

Static analysis result for SHA-256 979e816add894595…

MALICIOUS

PDF

87.1 KB Created: 2021-07-04 03:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a5cd5598d4f35acabd391c082bc07fb8 SHA-1: 8057442eeaf578608b0460f0082d4fb3f64fcdff SHA-256: 979e816add89459549730f8ae7cbe153e5d11c5760f85b414457314591c51d20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://infrive.ru/uplcv?utm_term=it+rubs+the+lotion+on+its+skin+quote PDF link annotation
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb208d3926b---95909187452.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/56094643928.pdfIn PDF document text
    • http://annabarons.lv/files/files/gisovafikadexamowegagizi.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/3b3886872991de7cdac9edf0aa42248a/leloro.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/faxoxetoxibifafubiw.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f6ad83087---retiw.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/51921a74d7571f842c955fb32d4435c6/32533337494.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7d70ba8ad---kosume.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/27660174978.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/44694825694.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/fesuwome.pdfIn PDF document text
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/87908976639.pdfIn PDF document text
    • http://fruitvita.com/files/files/34046183311.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///vivawaxeg.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210530170532.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160982ed9a37d9---97549276606.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4bbe549e5---22826134242.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/60bf006391dd37ba5b825080f8c651cd/rakerapovejalesoj.pdfIn PDF document text
    • http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/4480622260.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/49364887212.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea94ba9136---jidozejalidanutazobojezur.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075706c1778a---paxekaluvewowoga.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b71374ea09---xonuparoza.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

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_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 10472 bytes
SHA-256: a36496bd1fce23226cb3d7982e16f578c9198c3c6f16143efbb831d777d9d849
font_01_sfnt_off0001095d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 17712 bytes
SHA-256: a44e7429e2f7e58ef951963a8670276d02752283489410b85880a316bb1b3718
font_02_sfnt_off00013701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13701 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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