Malicious PDF — malware analysis report

Static analysis result for SHA-256 22921471fd1384a4…

MALICIOUS

PDF

78.7 KB Created: 2021-03-23 12:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1096bbba81717aac0e00e7ee16dabe8e SHA-1: 8f6f5acb758b8fbc836037fcb8529a41b7b132bb SHA-256: 22921471fd1384a417eeebe7dd6b2963350b2f70a771401e9955c55dc8d3d043
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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 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://midufefew.ru/strik?utm_term=what+it+means+to+be+puerto+rican PDF link annotation
    • http://moneyindia.site/book_review_the_secret_rhonda_byrne389h3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498997/normal_5ff64f1e5ac58.pdfIn PDF document text
    • http://boxberry-24.cc/pijuzoxukubolexe2ck73.pdfIn PDF document text
    • http://wisitens.online/fakineluzawijekijutoonr4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444852/normal_5fec4204c0745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_5fd13dac14d5f.pdfIn PDF document text
    • https://wixolovab.weebly.com/uploads/1/3/0/7/130776385/belarikutavim.pdfIn PDF document text
    • http://fujenotaj.22web.org/general_mattis_resignation_letter.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/8060c6.pdfIn PDF document text
    • https://fakavenudir.weebly.com/uploads/1/3/4/0/134042443/7b212bded916bed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367308/normal_5fdeb38f96fe5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458829/normal_5fe22d777c7dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_60251e9f516b4.pdfIn PDF document text
    • http://mikrotikwizard.com/gepukejizixojugijiroxezegl5e84.pdfIn PDF document text
    • http://smartcreditus.info/jijepididena9flkt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449014/normal_601b1a6b201b4.pdfIn PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/japuzitubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_603a53a1b8b05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd67c194-76da-4b7e-ad18-be69984f70c0/can_i_sue_someone_for_lying_on_a_police_report.pdfIn PDF document text
    • http://sewavun.epizy.com/57060644242.pdfIn PDF document text
    • http://mobejegi.epizy.com/99122292364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd799d36-2844-44c4-8415-d983cba52226/47330278901.pdfIn PDF document text
    • http://kojelowebug.rf.gd/encyclopdie_mdicale_larousse.pdfIn PDF document text
    • http://wumumusonozukak.epizy.com/mogadozawugab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c62d02dc-d33a-451c-9afe-2852d4682373/old_school_runescape_boss_hiscores.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_off0000f620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF620 5296 bytes
SHA-256: a322ab9b07fd0e27000a11d614727f65a4197fd0b5e54931b861a729762c4292
font_01_sfnt_off000107ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FF 10988 bytes
SHA-256: f6623eeef2a6ccbebacd447da0e45c80ee16e106a7faeab4b7421e23f6fde4a8

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