Malicious PDF — malware analysis report

Static analysis result for SHA-256 696137b7c9162a0a…

MALICIOUS

PDF

77.1 KB Created: 2021-04-28 01:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d3a275eb2c3190012345caa73d497b50 SHA-1: e6845371a82dfe863b8bfc5502485dc1990e3f3c SHA-256: 696137b7c9162a0a2dba3552f5dc990a14523cd0e7a3085d2e58af2d21d6071c
186 Risk Score

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 0.9991

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://soxebez.ru/strik?utm_term=mark+twain+the+damned+human+race+summary PDF link annotation
    • https://gopogusefivow.weebly.com/uploads/1/3/1/4/131406686/4832279.pdfIn PDF document text
    • http://tazanup.mypressonline.com/analogy_reasoning_in_english.pdfIn PDF document text
    • https://gepadera.weebly.com/uploads/1/3/0/7/130740344/pusibevemeduti.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/lenovekagarazo.pdfIn PDF document text
    • https://tovibimatajo.weebly.com/uploads/1/3/5/9/135963052/mofisaj-desekit-soxeze-gubajakurabobo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://julisanusifi.rf.gd/proxy_bypass_list_format.pdfIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_0134095464b84aebbc2f63d37ced5f44.pdf?index=trueIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_7bea7389395f436eafcef8e9b18e5a65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e02053-9146-48cc-8e95-7ac36504bc89/17519869810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf3a8c1-27a5-4507-a4aa-d8a8440d8499/gokojivigowazapogirutakes.pdfIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_30502a881dac4c8f9004b3a57160211f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f2002a-9d3d-41e7-80c3-1db36f9cb62d/big_little_lies_book_summary_chapters.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/los_crimenes_de_la_calle_morgue_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a8ee90-c0db-4d58-a912-adb33dee90d0/dolatinolemoximodarop.pdfIn PDF document text
    • http://notewewagegev.rf.gd/xebuxibutigikabevefawin.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_85d753a7a37b4264ab3d2ffa6edc0b35.pdf?index=trueIn PDF document text
    • http://galopaxuvubopuj.rf.gd/good_resume_template_singapore.pdfIn PDF document text
    • http://zomojafo.epizy.com/domigo.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/how_to_repair_a_wine_cooler.pdfIn PDF document text
    • http://sepijizalababom.epizy.com/evh_5150_iii_50w_stealth_manual.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_449f6dd245244a349e9a9a1848398a9a.pdf?index=trueIn PDF document text
    • https://14e2190e-1c7c-401b-bdd1-4e50d95f8180.filesusr.com/ugd/62a579_249b5f9e9a754d9da54880032b13c9c5.pdf?index=trueIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_2987ae7a1ee6427ea617f7075b7ac8d1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbc8ea17-2e0d-48b6-a75d-c287385147e0/roland_xp_50_keyboard_price_in_sri_lanka.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_off0000eff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF0 5412 bytes
SHA-256: 9eec5d1e9898f02108d4cff044d7d13a2917eba82464b344c2dbfc6f4adc1876
font_01_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 10616 bytes
SHA-256: 884abde61b812303f2fbe8d9f81b877c34d24e4fc9dee8870d30b9adb48835df