Malicious PDF — malware analysis report

Static analysis result for SHA-256 f930d0287e68c666…

MALICIOUS

PDF

79.7 KB Created: 2021-03-19 22:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d22e1ba06a1ef386a5d330290c3c945b SHA-1: d7017aec7d1ba2d3bf528ac2772810227ad38217 SHA-256: f930d0287e68c666b18f0e4582ba5ed94566848424fa85108e6d10728ec9ecda
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic, with one prominent URL being https://soxebez.ru/award?keyword=amyloidosis+in+dogs+pdf. The presence of a QR code lure further supports a phishing or redirection-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://soxebez.ru/award?keyword=amyloidosis+in+dogs+pdf PDF link annotation
    • https://cdn.sqhk.co/begokaxawip/bSlShfw/78294198750.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/alchimistul_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_602c4de45284e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_601ae506e5dc8.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/X5u4nIG/3827625881.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/hahhbhe/online_multiplayer_games_with_friends_mobile_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410975/normal_5fdcf650729e6.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/FhfpMie/tuzepi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486359/normal_5fec453be82b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6029282f27b25.pdfIn PDF document text
    • https://cdn.sqhk.co/ninituraxasu/hcPSgiB/juzafojezoxut.pdfIn PDF document text
    • http://xifasiv.getenjoyment.net/14777113908.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/who_is_doing_free_covid_testing_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/ijjaQgf/real_football_games_2012.pdfIn PDF document text
    • https://cdn.sqhk.co/xilelawemu/hjffhca/dixie_d_amelio_new_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ninasivol/why_is_my_epson_wf-3640_printing_blank_pages.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_accd4ee28cbb432891462857aafdf980.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/inorganic_chemistry_experiments.pdfIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_18cbb1a05c1f4490969c8920d75e1632.pdf?index=trueIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_9ba17aa2f64d45da995bf106209b387c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wisuw/jurigadavejerudurijozeb.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/cv_template_for_students.pdfIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/79593628133.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://scripts.sil.org/OFLIn 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_off0000d79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79A 4736 bytes
SHA-256: 30c2295501dffe96b4d929e14eb875da1880ff04a80451f8f385fa175d6e7210
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 10732 bytes
SHA-256: 67b143c04c0980a9a28ff591ceb6a72936738f0e0f0874a0932015cffb9346d4
font_02_sfnt_off00010c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C75 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off0001210d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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