Malicious PDF — malware analysis report

Static analysis result for SHA-256 832059356b8ccf9a…

MALICIOUS

PDF

80.5 KB Created: 2021-01-21 18:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7e1e30e047fe1b5c326f29aaa2a6448e SHA-1: e093717ea175ee73ef350c87b170f40214f00002 SHA-256: 832059356b8ccf9a0b52a857a289f7d98af971fc824e81a71310993954c8113f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect users to malicious or deceptive content.

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://seumenha.ru/123?utm_term=ftp+server+list+india PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368752/normal_5fe493e176cd0.pdfIn PDF document text
    • https://site-1177842.mozfiles.com/files/1177842/pizepurozozazoripoduvilul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390373/normal_600498a887d89.pdfIn PDF document text
    • https://jogijomovap.weebly.com/uploads/1/3/0/9/130969693/geturese_kajox_dudilopamegej_bezelogedas.pdfIn PDF document text
    • https://zebilukirun.weebly.com/uploads/1/3/5/3/135306511/3447046.pdfIn PDF document text
    • https://site-1172267.mozfiles.com/files/1172267/color_roll_3d_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392444/normal_5ff62a37dc4b7.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/tanix_tx9_pro_user_manual.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/degexom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5fd11d0625b1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_5fe875d5df551.pdfIn PDF document text
    • https://kazawiluk.weebly.com/uploads/1/3/5/3/135384823/4119398.pdfIn PDF document text
    • https://zaporori.weebly.com/uploads/1/3/4/1/134131460/gekakobefegul.pdfIn PDF document text
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/4075239.pdfIn PDF document text
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/3872884.pdfIn PDF document text
    • https://site-1212128.mozfiles.com/files/1212128/sonomefodu.pdfIn PDF document text
    • https://wedoweniwan.weebly.com/uploads/1/3/5/3/135308992/fejovebiv_joliku_kekoxeliteni.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/zerepuzuze/urbanismo_ecologico_mohsen_mostafavi.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/bernoulli_differential_equations_problems_and_solutions.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 4968 bytes
SHA-256: 3eeebe95d6489a5bcfb52b6c36d5c5742a5bd1d0e270c013e639a07f9766c87f
font_01_sfnt_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 10992 bytes
SHA-256: 74701995e1e6d8502e2fa630767aa70ce32bc03447e27883245181ff95c31b44
font_02_sfnt_off00010e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2A 11168 bytes
SHA-256: 9f62dd11507e1a54c9b8bb10330724b5221cfb96d75abb54139eb81a6eed1162