Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e8eaf6f44ab763…

MALICIOUS

PDF

78.1 KB Created: 2021-02-24 05:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a7dbeeed4c44e6fc77846655d660a65b SHA-1: eb03047f12b6733a12b78d33f14ef1f8d55e549e SHA-256: d2e8eaf6f44ab763083a267cf4938d0b65d06d4f0b463dca2e2bcfd0e34618e8
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=does+gamestop+repair+game+consoles PDF link annotation
    • https://tirotoperanape.weebly.com/uploads/1/3/4/3/134315774/1054dfd4b21d951.pdfIn PDF document text
    • https://cdn.sqhk.co/fuguwaso/hkRTZ77/oneplus_launcher_keeps_stopping_oneplus_7.pdfIn PDF document text
    • https://nulumekut.weebly.com/uploads/1/3/4/3/134373747/movewamapuka-gefalozej-wirogitugeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417207/normal_5ffa7704b212a.pdfIn PDF document text
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/goneropikogaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423427/normal_5feb6db5b09ef.pdfIn PDF document text
    • http://arboozfilm.com/call_of_zombies_3_unblocked4o011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465263/normal_5fe4f7acbd5fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_5fd8535a38f1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405925/normal_60057d9f241d4.pdfIn PDF document text
    • https://zesakexe.weebly.com/uploads/1/3/5/3/135314388/toluvuzajuko.pdfIn PDF document text
    • https://bugojexipu.weebly.com/uploads/1/3/1/3/131398417/pixaduwezi.pdfIn PDF document text
    • https://fimupekegu.weebly.com/uploads/1/3/4/5/134502303/6060495.pdfIn PDF document text
    • http://samoe-samaya.ru/sapekusebenuwazavunuked1pa5b.pdfIn PDF document text
    • http://remastacer.com/geometry_practice_worksheets_grade_6nlwc0.pdfIn PDF document text
    • http://mists.space/pefubulodeguboxeldx1ny.pdfIn PDF document text
    • https://mojivuza.weebly.com/uploads/1/3/0/7/130775228/6908979.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/newefufakesajogoniw.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
    • http://bidilud.rf.gd/felimefoka.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_off0000e69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69C 5040 bytes
SHA-256: 3b2302af7a0a469965b7f2b5122417f7856c627397cc09b19d629571bbcebac8
font_01_sfnt_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 10852 bytes
SHA-256: 607b97b50127ce2e7a485682d645ecff00ced7aedb260f4d8f9ca603e7880b24
font_02_sfnt_off00011cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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