Malicious PDF — malware analysis report

Static analysis result for SHA-256 babf73ac42fd6643…

MALICIOUS

PDF

83.6 KB Created: 2021-02-26 19:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 130bd470aa31240a732dfdfdec51c4f8 SHA-1: da81d14ba2bc3215cb8e9c4f136045151bcd2bdd SHA-256: babf73ac42fd6643f3ddbbb7f98c624810fea400720a46970a9b1cb60e93fc3f
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 other PDFs, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://seumenha.ru/strik?utm_term=literary+devices+practice+pdf PDF link annotation
    • https://cdn.sqhk.co/wazilisiko/ihaBiaW/murder_mystery_movies_on_hulu.pdfIn PDF document text
    • https://walanugenaxoduf.weebly.com/uploads/1/3/5/9/135964425/nebenoteditule-zukemotow.pdfIn PDF document text
    • https://kenoduzuran.weebly.com/uploads/1/3/5/3/135350653/sexitovufuveded-walodezatinisa-vexifenetuvomeb-kaliv.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/luremimum_kuladuv_vasotimibo.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/mizamudup_risafov_rikun.pdfIn PDF document text
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/kesamumutigo.pdfIn PDF document text
    • http://24goodstore.site/husqvarna_yth24v48_oil_filter_cross_reference_charte0zh2.pdfIn PDF document text
    • http://porn77.design/3780311226uihjr.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/65073782227gok9m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/monstrous_regiment_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/wodemutekevasofu.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/like_someone_in_love_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/rejuta.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/38506771121.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/pexuduk.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/lopenomigewamejop.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/boomerang_full_movie_tamil.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_off00010c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6B 5220 bytes
SHA-256: 974d9f1a872289ae4ff94f0110d1790e89929b7b8bcbe3eb6037e32a5ab74e2b
font_01_sfnt_off00011e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4F 10424 bytes
SHA-256: c5b5e8c0a9975efc89171c788f30fa0306b3cb1553905538ce54ad9aabb4123a

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