Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b03fbe2556e7938…

MALICIOUS

PDF

74.7 KB Created: 2021-01-03 04:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eccd2e0caa9c2cbea4478e1ef59f14be SHA-1: e88e2c8823ccedc7e8f917b1b986668c2eddff1a SHA-256: 8b03fbe2556e793881cd5eb41576cd8a5c5783991847a739b0399d2f9091c78a
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous embedded URLs designed to redirect users to external sites. One of these URLs, 'https://traffmen.ru/aws?utm_term=barnet+council+planning+guidelines', points to known malicious redirector infrastructure, indicating a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffmen.ru/aws?utm_term=barnet+council+planning+guidelines In PDF document text
    • https://palekamenagogu.weebly.com/uploads/1/3/2/6/132682235/941827.pdfIn PDF document text
    • https://rafomuvufeja.weebly.com/uploads/1/3/1/8/131856077/vufotosos_gifebugona.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/iajchhq/xidiwarov.pdfIn PDF document text
    • https://fobopogukigu.weebly.com/uploads/1/3/4/3/134366855/b0c23.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/DCsgdjh/anime_maker_avatar.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/wulelinosulisik-besugab-pilipiw-mudaledil.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/f68fb1.pdfIn PDF document text
    • https://vigofamuzozovi.weebly.com/uploads/1/3/4/6/134671609/jexuraxem.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/13582eaf-84e4-4904-a6e9-0704fc5b1260/24632131760.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/penizixitat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7878485-854b-48cc-a8b9-775bf368e245/59081895095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f997367-7ee6-436a-bd90-1e899b86d0a1/1957_wheat_penny_how_much_is_it_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e7e748-a707-458b-9f8b-e0a70f0037c4/beparanejosigojowotobena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22b74c2-b4e9-47c8-b575-a5bb5d972af3/87100852924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee325d01-4444-4b76-979c-79c796f76955/mugen_nsfw_build.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3e3906-ffbc-4c49-aa9d-7454f8225331/95653620876.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_off0000e852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE852 5292 bytes
SHA-256: 5d267d630dcbe4ad9038c37de1df02475c2042b9311e22160703930eed782f98
font_01_sfnt_off0000fa5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5D 10296 bytes
SHA-256: a2880e5f18e6c5efd23b188c2c0d2385f289c49ce6d689b1d67a643b90d3f7b1