Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42363205d74fc6f…

MALICIOUS

PDF

83.9 KB Created: 2021-03-01 22:14:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80ee2a9fde8c4e9d4ffae166882a9d89 SHA-1: e0de4595b4ed33db129bcd2715c7628c1a2ea9d3 SHA-256: f42363205d74fc6fcab68320c924cd6dc0ccc8e7d9f3e3d218d511a466c86810
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 pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or scam attempt, likely leveraging a lure related to 'forklift training cost' to direct 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://jacksth.ru/aws?utm_term=forklift+training+cost
    • https://denogowozule.weebly.com/uploads/1/3/5/3/135326247/magojiwuwusib.pdf
    • https://xelewutoritawi.weebly.com/uploads/1/3/1/0/131070131/fufipejepuwuko.pdf
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/guduwaziwemodovi.pdf
    • https://tizojutatow.weebly.com/uploads/1/3/1/4/131406606/powezeb.pdf
    • https://static.s123-cdn-static.com/uploads/4416318/normal_6001e61556ea1.pdf
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/sijuvavujuwiwibulin.pdf
    • https://pakipetunora.weebly.com/uploads/1/3/4/8/134881281/3948435.pdf
    • https://cdn-cms.f-static.net/uploads/4471704/normal_60149e1780765.pdf
    • https://static.s123-cdn-static.com/uploads/4383918/normal_60013dc66d721.pdf
    • https://pujakopevu.weebly.com/uploads/1/3/2/6/132682627/dce50a152.pdf
    • https://wujadadi.weebly.com/uploads/1/3/1/0/131070572/8fc2077b535600d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pilazi/b_pharmacy_2nd_sem_syllabus.pdf
    • https://s3.amazonaws.com/wazorixekunafob/94012257675.pdf
    • https://s3.amazonaws.com/wutogugej/kenmore_microwave_model_721_parts_diagram.pdf
    • http://zilapiwet.epizy.com/bombas_de_engranajes_internos.pdf
    • https://s3.amazonaws.com/tevomenil/71308252692.pdf
    • https://s3.amazonaws.com/xukonakefules/lateral_lisp_worksheets.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_off00010be3.bin
c2c8e9535878ffc8adb1577003cd7a582177d1a75c94966cf43d5b28af46cf2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE3 5068 bytes
font_01_sfnt_off00011d3e.bin
17d4ff41d94e6ce03f3c85a26361a1a549fb141c1feca0cf316dc39342cd34c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3E 10952 bytes