Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba9b4241fde755b…

MALICIOUS

PDF

80.8 KB Created: 2021-06-10 10:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f4d04ce70e235a0464e218d900fa7636 SHA-1: 2b1d4e8257c0d33a6d2689b55da9a5a65dddcecb SHA-256: 3ba9b4241fde755b6b0ef7389d0e51aa252b909fe28a76c360c56b7eb7aad55b
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL and the document's structure, despite the garbled body text, point towards a phishing or malware delivery scheme.

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 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://oniceh.ru/pbw?utm_term=spirit+guide+sleep+meditation PDF link annotation
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/jimesuzuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388839/normal_605a8fc82dc1f.pdfIn PDF document text
    • https://bigudiwox.weebly.com/uploads/1/3/5/3/135304820/4401927813.pdfIn PDF document text
    • https://fumasidabufip.weebly.com/uploads/1/3/0/7/130775820/nodigakiwiverekolar.pdfIn PDF document text
    • https://ladukupubavar.weebly.com/uploads/1/3/0/7/130776836/biwojomedo-tuporag-wafas.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/7453070.pdfIn PDF document text
    • https://murozukuzofapu.weebly.com/uploads/1/3/4/7/134716639/dekoraf_sapixepaxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_60bcc9ea7f08c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494166/normal_5fce12ceb7f75.pdfIn PDF document text
    • https://wuzajamepoxomis.weebly.com/uploads/1/3/4/0/134096323/bowezarefafa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4047fc2-7b15-4a05-8266-db3b9035d8d6/kodukisemot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f3f150-d519-4532-825b-5dfa37d997ed/how_to_enter_online_poker_tournaments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1289fd0b-0f90-4c82-aace-0582cbb8b91f/241799057.pdfIn PDF document text
    • http://bovozajezo.pbworks.com/f/lefizigugapekemovefuvogiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64cd9b9-154c-4186-92fe-36bda497a23e/31791410810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f743ae-c081-4dcd-8b2b-09c7e7b12b80/the_managed_heart_commercialization_of_human_feeling_summary.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/f/zureris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4d35e9-2fa3-4210-8ed5-4d0bf631b0dc/is_a_wendys_frosty_a_dairy_product.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df873a9-cfe8-4a3e-b5ff-0bfbf3c9aee6/falovulujulosole.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/f/what_is_spark_plug_gap_for_lawn_mower.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/f/troy_bilt_5550_watt_generator_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/295227c7-77c3-4d4a-8c99-c7489e681a07/30562187000.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_off0000fd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 5384 bytes
SHA-256: 2f0fb8aa45016934a0be0cb754aa8b6611c59385a7eb6cebeef3b8094e477af7
font_01_sfnt_off00010f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F46 10832 bytes
SHA-256: 8a976b8ff07e64c85ef0f5db8bdf449132e73d6e0e54fdd60a6436ef622af29c