Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d5a3edf8b62498…

MALICIOUS

PDF

111.1 KB Created: 2021-03-08 06:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ae9b378c286d7371d5d29d44a7b6c3c9 SHA-1: 0e8224153c29d15f62c8044d5d2c20b8f320c474 SHA-256: d3d5a3edf8b62498bfaeceb874abc3e5716db096341f63047d26a14f12c5d65a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, with many pointing to disposable hosting, suggesting a link farm or SEO spamming operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate that the primary purpose is to redirect users to potentially harmful external sites, possibly for phishing or malware distribution.

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://fokemale.ru/wb?keyword=american%20bulldog%20pumpkin%20stencil PDF link annotation
    • https://xabonawof.weebly.com/uploads/1/3/5/9/135965837/887bc6e818250b6.pdfIn PDF document text
    • https://fokifukamanur.weebly.com/uploads/1/3/0/8/130874497/niparezewe.pdfIn PDF document text
    • https://cdn.sqhk.co/dikulodut/hjWiaSI/crowded_table_lyrics_and_chords.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495399/normal_5fefa988d6343.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/6GOghhb/photo_editor_for_android_with_layers.pdfIn PDF document text
    • http://fubewakixodi.22web.org/the_other_side_of_heaven_1_full_movie_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/ic4Mhd1/wooden_100_block_puzzle_wood_hexa_star_gems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449793/normal_6008108249b8d.pdfIn PDF document text
    • https://cdn.sqhk.co/zonelatu/wchKMif/kilijejun.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/dusopusixanub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5ff29636e0898.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/ggjehgC/sebabuditod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/24381497172.pdfIn PDF document text
    • http://milosevogoza.rf.gd/61492331892.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/how_much_do_costco_hearing_aid_batteries_cost.pdfIn PDF document text
    • http://difoduniba.epizy.com/bob_revolution_stroller_double_used.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/commandos_strike_force_full_version.pdfIn PDF document text
    • http://juxuvirorut.epizy.com/plantronics_backbeat_go_810_wireless_noise_canceling_headphones.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/wedding_anniversary_cards_psd_templates.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_off0001761e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1761E 5584 bytes
SHA-256: 24780bfd26a1249de305e10559f950bc2ca6439cc88930aa2f8537e5c13c330b
font_01_sfnt_off000188fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188FE 11880 bytes
SHA-256: fb4371d45070ad72f9f20e65b439dae2bfb00f7fa8f444ba5d83668a5c1df355

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