Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5453768a2fefb1…

MALICIOUS

PDF

103.8 KB Created: 2021-03-23 12:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1c46d18abeef16ab948f7cbef589316 SHA-1: 6761c8286b169d25725c263e8cc8a5bf5b1af43b SHA-256: 2e5453768a2fefb1244252612fd302746fa31e7bbe1e63cc9325d26cadefb7fc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or a distribution mechanism for malicious content. The presence of ClamAV and ML heuristic firings strongly indicates malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/123?utm_term=brutal+doom+3+para+android
    • https://jinizunoluvazo.weebly.com/uploads/1/3/4/5/134592141/felusuvaweren.pdf
    • http://merovew.xyz/19130045431pk2ac.pdf
    • https://togurugake.weebly.com/uploads/1/3/1/4/131412858/vinexenov-jusidakal-ravelurilinisev.pdf
    • http://lejijalipuxudi.22web.org/modowevowozosilivaxalaw.pdf
    • http://labincom-med.ru/88140209863xp8aq.pdf
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/wubop.pdf
    • https://cdn-cms.f-static.net/uploads/4465707/normal_601459ff165e1.pdf
    • https://static.s123-cdn-static.com/uploads/4413465/normal_5ff4a4baeb9d8.pdf
    • https://veledagovivavav.weebly.com/uploads/1/3/2/6/132681602/febogogaxazi-jerexufanuluf-werikosokikozi.pdf
    • http://razetinebi.22web.org/separation_of_powers_means_in_law.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/miwolezedubujoz/gidibadidubapesedo.pdf
    • https://s3.amazonaws.com/zuniverijesud/38767268280.pdf
    • https://s3.amazonaws.com/dupula/jakagoji.pdf
    • https://s3.amazonaws.com/wiremeresegikon/rimworld_ice_sheet_1._0.pdf
    • http://toxitule.epizy.com/76968036917.pdf
    • https://s3.amazonaws.com/nunakixuma/sony_bravia_dav-dz170_home_theater_system_price_in_india.pdf
    • https://s3.amazonaws.com/kavifunaruvi/14454756174.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015722.bin
c99ccac2749e60f475c34cd13783a1cd85d1fe9571a8672e990580e30c5279fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x15722 5140 bytes
font_01_sfnt_off00016882.bin
8a32fa71d8881d07a941fab2ec4e07c100236da1d51ffcabe259b6524c612a68
pdf-font-stream PDF embedded font (sfnt) at offset 0x16882 12192 bytes