Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd2405f8a8fa9a2…

MALICIOUS

PDF

83.3 KB Created: 2021-04-04 07:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 44deb35ecfe94849abb67fa65b436daf SHA-1: 27794b1c89d1be5252b09a4a494b5114fc4b5a84 SHA-256: cdd2405f8a8fa9a204b1444dc425d273978df763948228425d9293022d3bbabf
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on suspicious domains and are presented as free resources like guitar chord charts. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/strik?utm_term=guitar+chords+chart+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414696/normal_5fe91713e4cf5.pdfIn PDF document text
    • http://lotsmen.com/android_version_oreo_mobilesurqqj.pdfIn PDF document text
    • https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/duwisuj_watekaravikivo.pdfIn PDF document text
    • https://mufebukevep.weebly.com/uploads/1/3/4/0/134096334/3ae96f7383d7.pdfIn PDF document text
    • https://gixefizavemo.weebly.com/uploads/1/3/4/1/134108956/88a4c9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444882/normal_5fddb2c754dcd.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/talubgedd0.pdfIn PDF document text
    • https://digikugububim.weebly.com/uploads/1/3/0/7/130774990/jepetubabatowu_zeluv_lotixexexubos.pdfIn PDF document text
    • https://maladekokox.weebly.com/uploads/1/3/4/7/134745457/e50b113847ea397.pdfIn PDF document text
    • http://meetsoda.club/weight_training_program_without_weightsrz8g3.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/mogipegi/ronco_showtime_rotisserie_and_bbq_oven_5000_platinum_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/c_form_for_hoteliers.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/noxajufafinejo.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/20611645695.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/muxazom.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/71358607942.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/does_ahsoka_tano_die_in_clone_wars.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/govupewutuxelibaka.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/sibaretir.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/xonomipolotepalulix.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/41917739807.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/2013_subaru_impreza_sport_limited_awd.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/suspicious_activity_report_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/69768077641.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_off000105eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 5244 bytes
SHA-256: e6346e22209ff5c3debf94c8f24b38cf864098dbaf57ef5374959a989db44a77
font_01_sfnt_off000117bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BB 11308 bytes
SHA-256: da70d59fef80b4502678300bdb6aff20d09a1287800c1d39019bb29f04c9398a

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