Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7190851834d60d…

MALICIOUS

PDF

77.9 KB Created: 2021-03-17 02:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f940b05fecfcc34db201357c686959f6 SHA-1: e5c0b3b6cb9efec63911331c57ff994f0707e062 SHA-256: ca7190851834d60d134ff991856d45ae8357b23f0e808c28bf37ddcba600f1ca
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing lure. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of external URIs and the nature of the URLs suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://jacksth.ru/strik?utm_term=50+shades+of+gray+trailer+2 PDF link annotation
    • http://hs-life.ru/vox_valvetronix_ad30vt_footswitchcq9hs.pdfIn PDF document text
    • http://thiswaytovogue.com/99649189137kxw3q.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/iiUeicu/mumegeneju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_5fdc1c4a84699.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/nowadizifafiritife.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/putizalusi.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/bvChfhg/lesson_teacher_episode_2.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/hggwZW3/86130467160.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/rappel_anatomie_physiologique_de_l_appareil_genital_feminin.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/u7shjjh/70057207615.pdfIn PDF document text
    • http://natgood.space/95125285713dpsv6.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/common_core_ela_standards_grade_5_writing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403273/normal_6050f39a3bcb1.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/R1J4tax/dino_race_timer.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/star_wars_the_old_republic_launcher_update_problem.pdfIn PDF document text
    • http://runolive.com/short_disney_movie_quotes_about_lifep4nqg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5fd12cdaea348.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafodix.myartsonline.com/python_convert_ip_range_to_list.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/is_percy_jackson_in_the_lost_hero_book.pdfIn PDF document text
    • http://wipibefab.onlinewebshop.net/pdf_to_word_conversion_online.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_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 5572 bytes
SHA-256: 0e93ea0fb7b873e9521a8ee854762952f21b3f4d06794c74fcf92fcdecc7e99f
font_01_sfnt_off0001043d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 11108 bytes
SHA-256: 02b8c5c45c11d612c2738f3b227f30bca0e9bf4506e0d00fe2c593d6c66c258e

Open this report in the interactive analyzer, or submit your own file for analysis.