Malicious PDF — malware analysis report

Static analysis result for SHA-256 779e72817c20d4a9…

MALICIOUS

PDF

99.0 KB Created: 2021-05-28 17:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e4163daa18b7f34315fd4f108e36c25 SHA-1: 9910e2f9d2bdda00705f49e7083e3f84b7525a22 SHA-256: 779e72817c20d4a96bb1660916afef03fea978d1365da60f95007faa0e6c5cff
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though partially corrupted, indicates a lure related to downloading a GIMP manual, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URLs points to a likely attempt to redirect the user to malicious content.

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://jumiwimov.ru/strik?utm_term=manual+de+gimp+2.10+en+espa%25C3%25B1ol+para+descargar+pdf
    • https://bebejumupetokox.weebly.com/uploads/1/3/4/5/134513190/4533909.pdf
    • https://kukonite.weebly.com/uploads/1/3/4/6/134611202/feditofivulifikigu.pdf
    • https://fimupekegu.weebly.com/uploads/1/3/4/5/134502303/2326968.pdf
    • https://nebutoribuve.weebly.com/uploads/1/3/4/6/134615115/mufejagozudu.pdf
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/495110a.pdf
    • https://tuwureliw.weebly.com/uploads/1/3/4/1/134108737/936ec8317eb65.pdf
    • https://cdn-cms.f-static.net/uploads/4453338/normal_605a28fccec6f.pdf
    • https://koponabunabo.weebly.com/uploads/1/3/4/5/134520941/f35b7d15cea.pdf
    • https://zezazerin.weebly.com/uploads/1/3/1/8/131856191/fumabobojuwom.pdf
    • https://semumivotuwebaz.weebly.com/uploads/1/3/4/3/134379403/tibawoxupafuvudeto.pdf
    • https://zogerosolubelu.weebly.com/uploads/1/3/4/5/134576434/a8b7692.pdf
    • https://cdn-cms.f-static.net/uploads/4422637/normal_60685243ae655.pdf
    • https://gosaronazaniga.weebly.com/uploads/1/3/4/8/134851605/porokiv_virefogetisiko_wofekesoki_woninivab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/370851a0-1e5a-48ab-b044-21e7fa67d2c0/tumesipuko.pdf
    • https://uploads.strikinglycdn.com/files/522e61f6-f02f-473a-8e2f-851ddfcee658/uk_business_visa_invitation_letter_template.pdf
    • https://uploads.strikinglycdn.com/files/c624f1be-4499-40fd-bbcb-9be9cd9a9e36/zaxin.pdf
    • https://uploads.strikinglycdn.com/files/b742b860-9075-4ff9-bd91-3b105d4402b8/9018309667.pdf
    • https://uploads.strikinglycdn.com/files/3ca7fab3-c664-460e-8f35-36aa65d9a1dc/gta_san_andreas_xbox_360_cheats_max_swimming.pdf
    • https://uploads.strikinglycdn.com/files/1e3ee327-a7a0-4cc1-a68c-e66857c14536/kozeresidupu.pdf
    • https://uploads.strikinglycdn.com/files/9f72fd63-3c88-4526-bf70-b18d40a98e73/fowadudulirigijojo.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_off00013eee.bin
c3158ddaee05ebc3401397b1f9f60ab1fcfdc35291418505438a585b1402d2f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EEE 6048 bytes
font_01_sfnt_off0001534c.bin
6de40df7d0a2426cad060d47aed0adcb324e0bb400107f0c5a867b598a7654c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1534C 12556 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.