Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20e3efa320fae97…

MALICIOUS

PDF

78.9 KB Created: 2021-05-22 18:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 096c60e2f14106d205846fe6e5b5c713 SHA-1: 5339f39087e538661101473766dd156dd6a2ea0e SHA-256: a20e3efa320fae9795aa8b85cf223802e0dc52175da5cc56b3620a850e669458
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as search results for a movie. One prominent link points to 'vilenefex.ru', which is likely a malicious domain used for phishing or malware distribution. The presence of numerous external links suggests an attempt to redirect users to malicious sites or download further payloads, aligning with phishing and content-luring tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • 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/strik?utm_term=asterix+and+obelix+mission+cleopatra+2003+tamil+dubbed+movie+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415051/normal_603198ce10cd3.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/5499959.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/5476780.pdfIn PDF document text
    • https://jolumipeba.weebly.com/uploads/1/3/4/7/134766715/sabatefete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_60557e8162bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_604cbcc522dab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450140/normal_5fc87b8d78712.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_60094fbe4e957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fd63dac97f13.pdfIn PDF document text
    • https://pexekakuxop.weebly.com/uploads/1/3/2/8/132814074/715f80ec6cf0f9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465400/normal_5fce8e081aaf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498348/normal_5fdc9ff6d1070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_605042b98af02.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/xovekolamoxe/network_request_failed_android_emulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45b5398-f95a-4fc5-a520-126e11cdb413/how_to_replace_whirlpool_refrigerator_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00aa1ed-b288-41e8-ae17-97c91a4a3827/wetifodamotoru.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/gaduni.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/zoponavovopupawerejim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82dfed45-1c45-4196-b08b-f123e18f79ca/how_to_check_for_sex_offenders_in_california.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/45748646954.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/dosazuburupukupomajekupax.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/15644199639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8795c08a-6fc1-4719-813f-a6754c94325e/32150392961.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/how_much_does_an_appliance_repairman_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/does_a_cup_of_tea_cool_you_down.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86426fb2-6a37-48db-8e80-2565fb103855/seroxibilituzi.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/fumufonepalas.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_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 6004 bytes
SHA-256: 116a357e29df194f9b48f23a2e02cb3c2a7ca354d256124c7a859ffb1afb06af
font_01_sfnt_off00010787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10787 11608 bytes
SHA-256: d2f833083f4fb31c121a71f7629a8367b77c4a9a05e536c05cb7f8457d91e500