Malicious PDF — malware analysis report

Static analysis result for SHA-256 d692fc05e023c72a…

MALICIOUS

PDF

72.6 KB Created: 2021-01-31 08:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dcd02e6fe2d8fa1698b588d814e89afc SHA-1: 2de6fa76d1c51c6a78e0fbddc3b511bc6e2f4e26 SHA-256: d692fc05e023c72aae477368cc47744c2abadd483608345f77462ec033cc544c
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to link farms on disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a "download" button heuristic further supports the phishing lure.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/wb?keyword=final%20fight%20mod%20apk%20unlimited%20money PDF link annotation
    • http://satomupudogoni.22web.org/zogekifumurozoluxesuve.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/hfcmo1D/push_maze_puzzle_level_221.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/zjh4aVm/stickman_and_gun_3_zombie_shooter_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450347/normal_5fe8f9cf99fc3.pdfIn PDF document text
    • http://rimka.xyz/macbeth_short_answer_study_questionsztfjm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490129/normal_6013b359d4f2d.pdfIn PDF document text
    • http://oneplusonemain.xyz/9300640239h3oa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478148/normal_5fe75764e12b5.pdfIn PDF document text
    • https://cdn.sqhk.co/rinovizifim/Zhe0iaU/vemovopemubagemin.pdfIn PDF document text
    • http://shtangye.xyz/child_of_mine_carole_kingczx6i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446400/normal_5fcbfc8bf1278.pdfIn PDF document text
    • https://monemoret.weebly.com/uploads/1/3/4/6/134667898/zimijazarosorafegax.pdfIn PDF document text
    • http://rokexulom.22web.org/alaipayuthey_tamil_movie_ringtone.pdfIn PDF document text
    • http://ita-women.space/autocad_civil_3d_2016_tutorial_free_downloadaduz5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudewalazakukug.epizy.com/78876595517.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_off0000dbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 5304 bytes
SHA-256: 96599128fa30702be4671868cadf09c9911f5c674afcebbce7fa2ce2e6197d87
font_01_sfnt_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 11724 bytes
SHA-256: d42eb872a0c1e15b9edfafdcb568593a3a18cc143322b15e269850f390482920

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