Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafb1f7351f57870…

MALICIOUS

PDF

71.0 KB Created: 2021-02-20 11:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b0d8e11dbf73bd0ccc157896a71a34bd SHA-1: c0b50c6fba7bf1cdf1f45979293012e7567426ef SHA-256: aafb1f7351f57870646084aa5238ce265efa072c396797bd7e86a7e8e5c2f489
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the nature of the link farm point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

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://bologen.ru/wix?keyword=georgia+stormwater+management+manual PDF link annotation
    • http://fullpisetc.ru/what_does_a_dreamcatcher_tattoo_meanoiuwb.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimofaw/aihBZhd/mediaf_re_free_download_for_pc.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/getapajanetusi_lofax.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/ifaeih6/bt_block_puzzle_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fixeruzef/hihbeYc/jukokuzirixusu.pdfIn PDF document text
    • https://nemapawa.weebly.com/uploads/1/3/0/9/130969411/1108393.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/duhdXgc/68441755774.pdfIn PDF document text
    • http://kilesetemopibaf.22web.org/20838900655.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/hikgjjc/96799841397.pdfIn PDF document text
    • http://tehnopolis.org/57971920480v81xu.pdfIn PDF document text
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/f1b478a19ce9cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guwivuvasexi.epizy.com/regerajalupumokupeg.pdfIn PDF document text
    • http://salivokeru.epizy.com/gmail_account_for_pc.pdfIn PDF document text
    • http://mibovemijo.rf.gd/graduation_certificate_template_word_free.pdfIn PDF document text
    • http://zuzofigub.rf.gd/platform_movie_mp4_hd.pdfIn PDF document text
    • http://pinakebe.rf.gd/mozilla_firefox_browser_for_windows_xp.pdfIn PDF document text
    • http://witopovuketoj.epizy.com/increase_80_by_20_percentage_answer.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_off0000d963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD963 5128 bytes
SHA-256: 9f86787d8235b1f660361cd75741920e034df4f089397dd943e7a2677d82388d
font_01_sfnt_off0000ead3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD3 10616 bytes
SHA-256: 2d793caccd258cc2b530f454088ed15ef8adaff1ac3315fbf88e7c6c3a4ab547

Open this report in the interactive analyzer, or submit your own file for analysis.