Malicious PDF — malware analysis report

Static analysis result for SHA-256 764cecaed1bdd132…

MALICIOUS

PDF

107.6 KB Created: 2021-03-19 10:24:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5e026db33772a83b17fbea28438ece0 SHA-1: 7af6461b5bc4529609f65b5dd95def08e420f646 SHA-256: 764cecaed1bdd132872b5bac9f164966cd87fbab8377101b6e1c9f2821907663
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous external URLs, with several pointing to disposable hosting or link farms, indicating a likely phishing or malware distribution scheme. The PDF structure and embedded URLs suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://golowaki.ru/wix?keyword=chapter+21+hydrocarbons+worksheet+answers
    • http://whalesqpa.fun/gelobalukixipusok7wjmj.pdf
    • https://cdn.sqhk.co/naxupowu/5jNjdif/snapchat_arrow_icon_meanings.pdf
    • http://woxuruko.medianewsonline.com/is_fondant_dairy_free.pdf
    • https://muwivagejexe.weebly.com/uploads/1/3/1/3/131379070/2043022.pdf
    • https://cdn.sqhk.co/raxoxawupej/F7ifVhb/93616633847.pdf
    • http://sberbank.link/mikuni_carb_rebuild_instructionskjyy8.pdf
    • https://cdn.sqhk.co/wevafixap/Vgfigif/smok_alien_220w_tc_manual.pdf
    • https://muwubuzegutan.weebly.com/uploads/1/3/4/6/134649477/xatogawabebepobidex.pdf
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/gudetisiserewomadof.pdf
    • https://lafumunokude.weebly.com/uploads/1/3/4/6/134666321/9702431.pdf
    • http://testertumentum.space/wd_2.5_my_passport_ultra_metal_4tb_reviewgjxj3.pdf
    • http://sopisafexuj.sportsontheweb.net/58691563534.pdf
    • http://lnstagramsecurity.net/hampton_bay_ceiling_fan_light_coverltmjx.pdf
    • http://wawesoja.sportsontheweb.net/vavavitubevawitigoni.pdf
    • http://zebrait.fun/finding_perimeter_and_area_of_irregular_shapes_worksheetzwhy5.pdf
    • https://fotobuwab.weebly.com/uploads/1/3/4/3/134368258/baa1a.pdf
    • http://rijunoje.mygamesonline.org/fourth_generation_cephalosporins.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gakajitaju.atwebpages.com/brahma_vaivarta_purana_in_telugu.pdf
    • http://teluroluxeterez.myartsonline.com/xawuxepufa.pdf
    • http://gezixus.myartsonline.com/71491556169.pdf
    • http://nekelaxowe.atwebpages.com/essential_word_for_toeic.pdf
    • http://namepafubi.atwebpages.com/24126492052.pdf
    • http://popofisofol.myartsonline.com/research_methods_in_practice_strategies_for_description_and_causation_2nd_ed.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f9c.bin
ce60fdb71376f43ba9ea50cbd35f3c99b070b03ff79eafdc9d45c65603502b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F9C 5616 bytes
font_01_sfnt_off000162c0.bin
9b79738c48a1749f4a871979c122d3e117a2838adc6bf38cf02ee4e2b11ac80a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162C0 11728 bytes
font_02_sfnt_off00018b1f.bin
3d50f22d3ae6d9a4461c814f81554cc573a3512c555c2f223aedeeaca19cd658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B1F 16080 bytes

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