Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a6f2883c0e3399…

MALICIOUS

PDF

73.1 KB Created: 2021-01-27 17:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a17e03a529cc4c8f75e9483d50289886 SHA-1: 27344027aeefd9e095fc5be79dce8744e3f8f501 SHA-256: 80a6f2883c0e33990521764ee740b510570c9aae16f1c1f00703f485b6df4e04
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 large number of external links, suggesting it functions as a link farm, potentially for SEO manipulation or to redirect users to phishing or malware sites. The presence of multiple disposable hosting domains and UTM parameters further supports this assessment. No scripts were extracted, but the PDF structure itself is designed to facilitate the distribution of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=houston+hall+upenn+creperie PDF link annotation
    • https://cdn.sqhk.co/satidaruxami/cijpiid/monkey_go_happy_6_stage_12.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/pWhi6jf/ocerin_guide_hat_trick.pdfIn PDF document text
    • https://nofakuxuwuxow.weebly.com/uploads/1/3/4/6/134684799/5687544.pdfIn PDF document text
    • http://d2-club.ru/nigijepikomedilibupob1m4is.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/fRjfRhh/princess_and_the_frog_songs_almost_there_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/j7Fsieq/badofafipuxoxavefafaxud.pdfIn PDF document text
    • https://zeziruxowajud.weebly.com/uploads/1/3/4/6/134698921/2d3a88b51a0.pdfIn PDF document text
    • https://wafitaweligu.weebly.com/uploads/1/3/4/5/134587259/2537526.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/iifhelJ/45181098917.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/1437071.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/jarapez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramasewo.epizy.com/31942517172.pdfIn PDF document text
    • http://bujetazufukuv.rf.gd/birthday_songs_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/spontaneous_generation_vs_biogenesis.pdfIn PDF document text
    • http://repeputowuz.epizy.com/android_busybox_install_failed.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/cute_babies_funny_video_free.pdfIn PDF document text
    • http://sewoxoxitif.rf.gd/quadratic_factorising_questions_and_answers_gcse.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 4980 bytes
SHA-256: e7e5d60cc820deec364eac217ccd177ec7a3ee921b7f9ba2df2dd8988ec7c37d
font_01_sfnt_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 11168 bytes
SHA-256: 8737059b7e3e350e6e8aa211125e9659bb7e8cccf1bc577c96963c2e82a9b6cd

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