Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65e92fc91d17d6b…

MALICIOUS

PDF

109.4 KB Created: 2021-02-16 19:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bbc057eeb96452f8352fe5f005d479c2 SHA-1: 96d9db44934268738c583ab946b709457a09c099 SHA-256: e65e92fc91d17d6b9e89693f5e63f6a224099ca328783c2238ee4cb8ea9334e0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jacksth.ru/wix?keyword=mamiya+rb67+video+manual PDF link annotation
    • https://cdn.sqhk.co/pasededi/eidjaUT/hero_cycle_for_kids.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/c66a9f3bff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_5fd14adff247f.pdfIn PDF document text
    • https://tezifotunojoke.weebly.com/uploads/1/3/0/7/130776805/a60c19.pdfIn PDF document text
    • https://cdn.sqhk.co/besuduxikuvo/gjjnLVB/moonlight_game_streaming_apk_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_60139d676bbd8.pdfIn PDF document text
    • https://xisagoruno.weebly.com/uploads/1/3/5/3/135332800/4515293.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/iiihhfO/56581028148.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/MV7hehe/60338443382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_601d2c469d49b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_6014f7ad2681f.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/iaijfr3/41675479830.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/rupatojuko/vegaxojikivotumuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/banggood_online_shopping_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/pezezopejewe.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/detatasegedod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A4E 5336 bytes
SHA-256: bd4792c4c2ca3ba59ce6fb2bc2d470682c3daf95d418ff2ec52113dd9adcb829
font_01_sfnt_off00017c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C73 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00018501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18501 10316 bytes
SHA-256: e89932ba79dc22235f9e2349ac047de98267c8cd7f37c8d89d53fb3bcbb59dd5

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