Malicious PDF — malware analysis report

Static analysis result for SHA-256 7675e2e6fa1aa5c0…

MALICIOUS

PDF

82.0 KB Created: 2021-03-12 17:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 87fa2457d36458b814ab0917eadee23c SHA-1: 7c6cc6909e120ebd97cdf1f85845e90080cfc312 SHA-256: 7675e2e6fa1aa5c054cb44b0d7247941715d51a5bd88a8b82133fa3fa9976399
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a 'cuneiform language translator' lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to disposable hosting, reinforcing the phishing or malware distribution intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jottigo.ru/123?utm_term=cuneiform+language+translator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421783/normal_601d0063b7115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_603ee3d34dea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_6015b82f07785.pdfIn PDF document text
    • https://kelezisexuva.weebly.com/uploads/1/3/0/7/130739204/4f537ba962d4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480581/normal_5fe102a07412a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459628/normal_5ffc9fd90ac83.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/fesuda.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/iiYhbrU/bunnyhop_bhop_surf.pdfIn PDF document text
    • http://dedevolopi.iblogger.org/vuranojosigawogejize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_604180198bbbb.pdfIn PDF document text
    • http://jiviwizun.iblogger.org/5719250975.pdfIn PDF document text
    • https://jomitapekox.weebly.com/uploads/1/3/4/3/134319499/linakora-nubafef-gaxefad-xefulu.pdfIn PDF document text
    • https://boliminukedakos.weebly.com/uploads/1/3/4/4/134494229/6949596.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449766/normal_600910f7aaf97.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/KggiiQa/votaxelunaso.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/fPYDpgd/kiko_auctions_reviews.pdfIn PDF document text
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/vosamikuvisawif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://parakotevetit.epizy.com/investment_banking_for_dummies_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/68812651943.pdfIn PDF document text
    • http://dopisudul.epizy.com/kefavofumobidisozoxebuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/ribimaxanuvofosovoseke.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_off00010304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 4992 bytes
SHA-256: 2966adde59c663337da6f7bc0f3bc635fd9c42f63c8579f1678b11601c8ce9df
font_01_sfnt_off000113e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E5 11488 bytes
SHA-256: a3e63dabfadbcc1d412bc82eac11de601b341efb438786b6a686b36cad294a54

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