Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae80316e2ba9bbfa…

MALICIOUS

PDF

87.2 KB Created: 2021-04-05 11:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8af09dedb592f8e74308fe605d4d640c SHA-1: d19485d4c339520e9f10fb0c62a8c6c682383b17 SHA-256: ae80316e2ba9bbfafa960b241938561885125a60cb64185fdb7b514c7466d1da
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The embedded URLs and the document's structure indicate an attempt to lure users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/award?keyword=ceasefire+agreement+2020+pdf PDF link annotation
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/zewudanavaxo.pdfIn PDF document text
    • http://xuxazefovudiwe.iblogger.org/bowed_psaltery_sheet_music_free.pdfIn PDF document text
    • http://masovizifuzaro.iblogger.org/48898512382.pdfIn PDF document text
    • https://tenojamerefu.weebly.com/uploads/1/3/1/8/131857247/tivudavi_puxazixebutu_rabakuvab.pdfIn PDF document text
    • http://rudotera.22web.org/number_theory_mit.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/00beb9ea.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/vobuturinivi/47704721733.pdfIn PDF document text
    • http://dijaduluka.epizy.com/pubuzopeko.pdfIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_ec516c2d617140408c992d7bb882614f.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_91db77c63e8c485293575a9dfd419fd0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/game_god_of_war_ii.pdfIn PDF document text
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_e07bbeee793a4c24843518cb9604ca80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa4484de-44ba-4cbf-b464-3f3c7a13705c/why_the_yellow_heart_on_snapchat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7add13-8fc6-4432-8b23-476e2ac1ebd2/zazom.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/membuka_file_chm_lewat_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1e7b4a-0c58-4dcd-86f3-6745592176bc/fadoxivi.pdfIn PDF document text
    • http://xogobitigo.rf.gd/latest_amendments_in_gst.pdfIn PDF document text
    • http://dereduvate.epizy.com/apple_training_logic_pro_x.pdfIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_f6efa47a16984073b80cda424294b8b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e40d3f2-d9ae-4421-bb74-3a40c8c3ae02/39409964308.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/5215088844.pdfIn PDF document text
    • https://025b4bf0-2906-4f5f-8a0f-6d4b68fc9518.filesusr.com/ugd/148ee2_e9ec52ca20e148f3bb0d00ebd21c6067.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/vuruku.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_off00010bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 5508 bytes
SHA-256: 65ad3fa2fac7f0876a7fbd2635fbe93c56f805fbe08ec47dfb099f5194b915ce
font_01_sfnt_off00011e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5F 16384 bytes
SHA-256: 4f658f0266784b865f8b196b4e5fc5250fd144ee09c8e85480600fb2c285c315