Malicious PDF — malware analysis report

Static analysis result for SHA-256 95dc0d1165ef5a53…

MALICIOUS

PDF

68.2 KB Created: 2020-11-21 00:23:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: aa78896e0f6adfeb89f0d2a02a245d16 SHA-1: 0461a001b8bcc35c67ef12494a1812c152316637 SHA-256: 95dc0d1165ef5a536a9bc926777fc07dd58789af1b695bcc8af9bbe46acbeb48
186 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 6

  • 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.
  • 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://traffking.ru/123?utm_term=runners+edge+missoula PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f98dfba38578.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/d8629.pdfIn PDF document text
    • https://lixevipilevorox.weebly.com/uploads/1/3/4/6/134634278/pejanijotiv_gafonutifoduped_sonaf.pdfIn PDF document text
    • https://kixatefibav.weebly.com/uploads/1/3/0/7/130776592/7431175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_5f98fc34c34dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f871bb4eb12f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456666/normal_5fb5a1f9468b9.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/pekemizigepesu.pdfIn PDF document text
    • https://sabopedawexidix.weebly.com/uploads/1/3/4/3/134305122/wutabed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410703/normal_5fa36dfee2e6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_5f9f92b743b43.pdfIn PDF document text
    • https://jalekusurasi.weebly.com/uploads/1/3/4/3/134392531/taxifumituxasev.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/a3adcc37-3044-4d29-9c7c-991a2c41079d/51183971009.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/baseerat_ul_quran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/743d5609-3bd3-4ee0-9624-ef6d53703ef2/kufuvupimibibenijejoz.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_off0000b8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A1 5152 bytes
SHA-256: d3569bb20fcc35e3271f54e4c7a6181dc9467f32f10656cece542b94ecc00b42
font_01_sfnt_off0000ca14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA14 10840 bytes
SHA-256: 28efb3b759be7334387a46ed14e6fba02a94adc54bda2309dbc3d8e1818654f4
font_02_sfnt_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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