Malicious PDF — malware analysis report

Static analysis result for SHA-256 070e5dfd395636d2…

MALICIOUS

PDF

84.8 KB Created: 2021-03-15 18:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e9b11c47c5b3724d5153855a9545fe69 SHA-1: 5fba4c5c3b71e2310dbd66c34210ea029dd9802b SHA-256: 070e5dfd395636d2a444a891038a9cc883e4e9e4d04e81bda4875404ac7143a9
244 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=beginning+latin+poetry+reader+pdf In PDF document text
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/kimawozesigot.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/retew.pdfIn PDF document text
    • https://petivevidimow.weebly.com/uploads/1/3/0/8/130813859/voxujironet_werivumi.pdfIn PDF document text
    • http://lupupive.22web.org/himno_nacional_mexicano_completo_letra_original.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/8MMlOic/15411054941.pdfIn PDF document text
    • https://vulazijol.weebly.com/uploads/1/3/4/6/134648863/wejuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/fjgU8WR/free_online_games_to_play_now_fortnite.pdfIn PDF document text
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/4929842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_6027a89f997c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481411/normal_5fc6b4937f7b0.pdfIn PDF document text
    • https://cdn.sqhk.co/rutuliduzo/gidOfaQ/metric_system_worksheets_grade_3.pdfIn PDF document text
    • http://lavijowonuxogu.22web.org/frigidaire_top_load_washer_leaking_water_from_bottom.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/hggcji4/11991698489.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/xudopupolif-ditipexoto-xofow-musizigug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fe454c2c3c6a.pdfIn PDF document text
    • https://bowukobi.weebly.com/uploads/1/3/4/7/134706413/43f239461c.pdfIn PDF document text
    • https://munivimisidifi.weebly.com/uploads/1/3/4/7/134772296/divuzuwomulub.pdfIn PDF document text
    • https://mufajagirudul.weebly.com/uploads/1/3/1/4/131452858/mevova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425924/normal_5fd85ead20085.pdfIn PDF document text
    • https://kigokevorusom.weebly.com/uploads/1/3/4/7/134709893/6412b70968.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wubogijogazerew.epizy.com/bandlab_mastering_apk.pdfIn PDF document text
    • http://wowupopokidejol.rf.gd/15393885019.pdfIn PDF document text
    • http://bananamiw.rf.gd/ccna_bangla_download.pdfIn PDF document text
    • http://kalavelixafuro.epizy.com/88966489306.pdfIn PDF document text
    • http://ruzapuloj.epizy.com/89479076237.pdfIn PDF document text
    • http://tatefubuzu.rf.gd/simple_harmonic_motion_exam_questions_and_answers.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_off00010e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E75 5184 bytes
SHA-256: 561823a571b03c083b94a5d1a56c96f34140723edabde92c4a2748a40a767653
font_01_sfnt_off0001203a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203A 10960 bytes
SHA-256: 55662e399dc653e1e2314e9dd880e528ee98d467ad8b333d81ef523f06f89897