Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd878bd68d6ec34…

MALICIOUS

PDF

67.7 KB Created: 2020-11-27 11:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e13931ceba127cd7a7dec2828b8847b5 SHA-1: d129abc551c987795127be08d2566d9f1aeba81d SHA-256: 7bd878bd68d6ec34587e16418e13caffafc5f442c8c86eae754fe025d69349da
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, flagged as a PDF link farm. The primary URL, 'https://traffine.ru/aws?utm_term=ambarisha+kannada+film+video+songs', suggests a potential phishing or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection indicate malicious intent, likely to redirect users to harmful content or phishing 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-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://traffine.ru/aws?utm_term=ambarisha+kannada+film+video+songs
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/2b4378.pdf
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/8363686.pdf
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/2767676.pdf
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/fovusedurutagod_sekanener.pdf
    • https://subamepowesita.weebly.com/uploads/1/3/4/8/134875458/ninepuvil.pdf
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/12082.pdf
    • https://nixejinalir.weebly.com/uploads/1/3/4/3/134321479/1329566.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b0959639-d9c0-4388-99ff-f88bbc261c76/67576776813.pdf
    • https://uploads.strikinglycdn.com/files/a3551a41-1383-4460-88c9-cee74bc3bd2e/calcul_section_cable_schneider.pdf
    • https://uploads.strikinglycdn.com/files/09e58f3d-71ea-4c8c-9346-998febf46be0/zodabetexuxonebutigevaw.pdf
    • https://s3.amazonaws.com/vobuturinivi/nonobapudaluberilarop.pdf
    • https://s3.amazonaws.com/xupizewuxere/13272778040.pdf
    • https://uploads.strikinglycdn.com/files/e85b990e-b075-4886-a1aa-224e9d141acf/evony_the_kings_return_tips_and_tricks.pdf
    • https://uploads.strikinglycdn.com/files/8804588a-0008-4c9f-b6e2-650374825e03/72054617820.pdf
    • https://s3.amazonaws.com/kakekojezutok/rationalizing_the_denominator_worksheet_with_answers.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_off0000c8db.bin
04c6fa1c55f0fe160df4e8828eeeddc4d3d1180eb0856b1ddf4992ea94e14536		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DB 5576 bytes
font_01_sfnt_off0000dba7.bin
52b1b16d4acd929fb1d4f1b996f290251528b71a05edc2f4637203f94a25f73d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA7 11424 bytes

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