Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab22428317010448…

MALICIOUS

PDF

80.7 KB Created: 2021-01-23 05:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4e6d25ec67100191bea23369dc7d51bf SHA-1: 99000fc9e7189df6df22f87bffe0f4892694c50f SHA-256: ab224283170104487149450931dde305e9bf50329d9a8f3861949f9b2879fa10
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a phishing or malware distribution scheme, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/aws?utm_term=vidmate+video+er+for+laptop+windows+10 PDF link annotation
    • https://cdn.sqhk.co/wevafofed/hjjinja/84935927148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420031/normal_5fefb79e41597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370266/normal_5fdff6e396c1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447649/normal_5fef19a6bb96b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447663/normal_5feb0973ee8ae.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/gdYwheP/razefavijitilotija.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/HjfC4hb/soluwo.pdfIn PDF document text
    • https://sezunugavekavo.weebly.com/uploads/1/3/5/3/135321765/tasakorebitom_ligigozozuweru.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/VKs1K0b/sofezegu.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/kelaxivuxedosam-xopidukufaj.pdfIn PDF document text
    • https://site-1168155.mozfiles.com/files/1168155/58457744788.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxigivakupumun.epizy.com/85085524153.pdfIn PDF document text
    • http://sofijorube.rf.gd/female_angry_tamil_whatsapp_status_video.pdfIn PDF document text
    • http://xujiwusa.epizy.com/pc_master_race_build_guide.pdfIn PDF document text
    • http://tubujaj.epizy.com/punctuation_practice_book.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 5500 bytes
SHA-256: df87ba35690361a63cd62aa37d977f4f73c5e4e6abfa51f5a6e914e1f997caa7
font_01_sfnt_off0000fbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBE 10556 bytes
SHA-256: f251804be4906e1e4ded7713504f6e2439efebc0ad0b23cb14c51dd87f39b968
font_02_sfnt_off00011fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE4 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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