Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dba7195161501c5…

MALICIOUS

PDF

73.5 KB Created: 2020-11-16 16:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f92a5b506e9398aa3bc711826d5f1e9 SHA-1: 2bcac234420e9f84284a1d7acbdffa0b9e7ebd57 SHA-256: 7dba7195161501c546ab681465ef3219d7dc918b38bf398a7f3cdb4a05d64bf5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, forming a link farm, with the primary URL pointing to a suspicious domain. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or to download further malware.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=insinkerator+45+replacement
    • https://palekamenagogu.weebly.com/uploads/1/3/2/6/132682235/jomubazip.pdf
    • https://xogunepole.weebly.com/uploads/1/3/4/5/134529021/lurosisafetig_roxibisimasofi.pdf
    • https://filafibiwi.weebly.com/uploads/1/3/4/3/134316544/memuloloburixov_fexuso_gorugasavekana_sajaguta.pdf
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5f8e76ccbc311.pdf
    • https://cdn-cms.f-static.net/uploads/4492900/normal_5fab5e21ec71d.pdf
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/038b7.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/wotareropajewub.pdf
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/8de8b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/38d3e707-645e-40f3-ace5-37f8fd295cf0/walt_disney_s_leadership_style.pdf
    • https://uploads.strikinglycdn.com/files/cdbbc3ae-95a3-4b1f-8c89-fb400d3e630f/animal_jam_hack_no_survey_no_downloa.pdf
    • https://uploads.strikinglycdn.com/files/ce6276b4-3ade-4883-a5bd-5cb76f77204e/51001276977.pdf
    • https://uploads.strikinglycdn.com/files/2924f2d1-a208-441f-9480-65ad8632041f/xesijinezedeke.pdf
    • https://uploads.strikinglycdn.com/files/7c6d1aff-6aee-41f4-9a45-7916595e12dd/cuentos_en_ingles_basico.pdf
    • https://uploads.strikinglycdn.com/files/abf61b38-6387-4e1f-a2d8-ad80592a6d48/82842335082.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_off0000e031.bin
dc1e8d96b599878d9a0dbf865d5358d85a7a92e2d2cc4201f25465b7d838c14f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE031 5292 bytes
font_01_sfnt_off0000f22c.bin
1f4ac86a00f1f66264542ee641605d692fcdfea5d801d8a2dd7afa08fa8e2bd5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF22C 11624 bytes