Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49006ce0d6746d7…

MALICIOUS

PDF

81.0 KB Created: 2021-03-13 14:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 51202364b5033c7173a59fbcf4582aa5 SHA-1: 5fbfba9175719f27747c39d3db1e7612e9ae69b1 SHA-256: f49006ce0d6746d7b88efa14f1cf4a55a91b0177657485377d0ba7d2f37826ed
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 0.9998

Heuristics 6

  • 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.
  • 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://golowaki.ru/strik?utm_term=2004+ktm+450+exc+owner%2527s+manual PDF link annotation
    • http://rifivejawix.22web.org/cake_making_process.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/cgfgdjc/zuwudux.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/a03iioi/wutajodobapeza.pdfIn PDF document text
    • http://nogafadak.iblogger.org/89118615672.pdfIn PDF document text
    • http://biomaniix.website/can_a_protest_be_peacefulcyywy.pdfIn PDF document text
    • https://gogunijex.weebly.com/uploads/1/3/4/6/134679659/2ae9bc.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/loxawenularinekadu.pdfIn PDF document text
    • https://cdn.sqhk.co/nipumusawobo/BjceheP/70924013908.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/arabic_picture_dictionary.pdfIn PDF document text
    • https://raxaregos.weebly.com/uploads/1/3/4/3/134363135/jemigigorobod.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/f1ijICs/jokatuwina.pdfIn PDF document text
    • https://cdn.sqhk.co/dujovosu/jihjb73/78464056755.pdfIn PDF document text
    • http://gonzo-3d.com/45236075538fwhf0.pdfIn PDF document text
    • http://indital.space/evangelism_the_heartbeat_of_godps1ow.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/3vZ0PqY/mesafeliluzegegujurusigo.pdfIn PDF document text
    • http://arendagg.xyz/nikon_coolpix_l310_specsl0zmo.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://mewexam.epizy.com/arlanxeo_performance_elastomers.pdfIn PDF document text
    • http://supajiwa.myartsonline.com/bunarejajanaki.pdfIn PDF document text
    • http://merivitewije.rf.gd/what_are_the_essential_characteristics_of_feudal_society.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_off0000f290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 5428 bytes
SHA-256: 57802dd24b07190a416bdea5c45e51548ca05a86acd7913110e088bba56b8563
font_01_sfnt_off0001050b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050B 10408 bytes
SHA-256: b197e31aa79b127117f4fe9db640bd695be7ef8c0bf25ba890b3b422c707c26a
font_02_sfnt_off000128a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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