Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7832d083f9100c9…

MALICIOUS

PDF

77.1 KB Created: 2021-02-17 22:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72e0c3802054e2eb3e69e62631df0812 SHA-1: 790a699fef9d84f526c3bd43530dc686f71f1741 SHA-256: c7832d083f9100c9b09d60e761f1c1e3886c189cc3ce3043bc97cc2fab62a407
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution attempt. The document contains a large number of external links, many hosted on Weebly, suggesting a link farm designed to redirect users to malicious content. The presence of URLs like 'https://jottigo.ru/123?utm_term=hp+pavilion+dv6000+drivers+webcam' indicates a lure related to device drivers, a common tactic for phishing or malware delivery.

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://jottigo.ru/123?utm_term=hp+pavilion+dv6000+drivers+webcam
    • https://rifojiditesi.weebly.com/uploads/1/3/1/3/131379396/jojojake.pdf
    • https://sejesomizibiji.weebly.com/uploads/1/3/5/3/135346687/wavumidisex-nijedefusob-xatuzez-lovilezobom.pdf
    • https://cdn-cms.f-static.net/uploads/4411923/normal_600e6c808c0d4.pdf
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/dabarub.pdf
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/suminugafim_migulimozajotov.pdf
    • https://static.s123-cdn-static.com/uploads/4426415/normal_5ff064ab080b8.pdf
    • http://tivaxamikesu.iblogger.org/acg_lower_gi_bleed_guidelines.pdf
    • https://cdn-cms.f-static.net/uploads/4420222/normal_5fda811f21e96.pdf
    • https://cdn-cms.f-static.net/uploads/4459319/normal_601bd1845efdc.pdf
    • https://cdn-cms.f-static.net/uploads/4421341/normal_5fd1770a5638a.pdf
    • https://vumopofusub.weebly.com/uploads/1/3/0/8/130874587/jegamililileludatu.pdf
    • https://static.s123-cdn-static.com/uploads/4369907/normal_5ffd571b3285b.pdf
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5fdbfbd9e6eb1.pdf
    • http://lupokixez.22web.org/5_box_comic_strip_template.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://femodizabofowu.epizy.com/adventure_time_season_8_full_episodes.pdf
    • https://s3.amazonaws.com/bejikefowu/horse_riding_tales_pc.pdf
    • http://sonasekofuxix.rf.gd/lisa_simpson_sax_solo_sheet_music.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_off0000ef89.bin
642212cfe7ae9e5d3cc8a53859e7799d653d97899b7f9d588a9a50f5d3b4eed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF89 5768 bytes
font_01_sfnt_off00010323.bin
c009aa31dd8bb2e57e8a7ae6afc041ec2c121b83644101c6d27f99744127ac19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10323 10672 bytes

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