Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0db587a218e90b…

MALICIOUS

PDF

74.5 KB Created: 2021-03-16 11:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ae7b41d5ee1f8e3343fe10ab318daa2b SHA-1: adb17b3486edf89689b86ca2d4d2c917878133c9 SHA-256: 8b0db587a218e90b5f8ffb588d9ece931eb1c3fb6bbc8fafff17c5953eb3b2f8
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains a large number of external links, many of which are part of a link farm, and one specific URL is presented as a worksheet answer key. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to deceive users with promises of prizes or funds, combined with delivery requirements. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://seumenha.ru/wix?keyword=the+work+of+gregor+mendel+worksheet+answers PDF link annotation
    • https://bifugojatomawak.weebly.com/uploads/1/3/1/4/131437093/473043.pdfIn PDF document text
    • https://tezefidusipenu.weebly.com/uploads/1/3/1/8/131857758/2818127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499651/normal_6028149a2ccf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426556/normal_6020fc296c177.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/branson_tractor_service_kit.pdfIn PDF document text
    • https://kobivepetere.weebly.com/uploads/1/3/1/8/131871499/rozakezaxox-biwigigeza-sabufusetoso-daxip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5fe8d52724827.pdfIn PDF document text
    • https://geregilewupune.weebly.com/uploads/1/3/4/8/134849809/933b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_6043ffd94d26c.pdfIn PDF document text
    • https://zefijevizo.weebly.com/uploads/1/3/2/3/132302816/kiramotub-poxokopogakuwu.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/17425587465.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417213/normal_5fdde4dd526bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477638/normal_60017bb50c0ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xozeb/sunovifesigikitawugozi.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/chevrolet_lacetti_2005_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/good_ppt_presentation_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/38330774813.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/bullet_force_android_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/jajejitonekozajagodunamix.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/difference_between_social_constructionism_and_symbolic_interactionism.pdfIn PDF document text
    • http://mozaninukokefef.onlinewebshop.net/85512722347.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/puwanuxenovuposujegal.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 5424 bytes
SHA-256: a396a8e9236599167a191ff543e12daba5ee0be0281005601e79d14d59608477
font_01_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 10608 bytes
SHA-256: 9008dcd0520e087c3740e615eb824b9b4492e0857bbff14cb52d309fc3fa89b0

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