Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bb56c90507243d…

MALICIOUS

PDF

66.5 KB Created: 2021-02-11 14:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4b642a8a770e1ea6f2f588318a7cf910 SHA-1: 81f1a178179b28db1ae5bec31533a61acd2b0458 SHA-256: 38bb56c90507243d030391b3f7330c7e0133aeb8f8065781a837dd9a671d8387
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/wix?keyword=unit+9+test+review+trigonometry+answers PDF link annotation
    • https://cdn.sqhk.co/kinerufi/FSXdibv/74853319766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475715/normal_602144d829258.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuguxovim/ie7igTv/81152405328.pdfIn PDF document text
    • http://meriline.store/legendary_sword_of_dragon_controlys209.pdfIn PDF document text
    • http://civiliscmq.online/tovedon33x15.pdfIn PDF document text
    • https://jotukodapoze.weebly.com/uploads/1/3/4/6/134632246/5d7525.pdfIn PDF document text
    • https://lezezirurebox.weebly.com/uploads/1/3/5/9/135967023/499840.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/g3hjgiI/84848006919.pdfIn PDF document text
    • https://nofefikow.weebly.com/uploads/1/3/4/5/134510094/486255.pdfIn PDF document text
    • https://vazigawexike.weebly.com/uploads/1/3/1/6/131606690/negasuzorosagut.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/jjRheia/58596691845.pdfIn PDF document text
    • http://womumonafip.22web.org/isobutyl_chloroformate_synthesis.pdfIn PDF document text
    • https://jumufewaxijakuk.weebly.com/uploads/1/3/1/3/131380308/duxirunixilebup.pdfIn PDF document text
    • http://vatologox.iblogger.org/bmi_of_full_form.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/ianHLhg/4_pics_one_word_6_letters_clock.pdfIn PDF document text
    • http://bigonetudukori.iblogger.org/biocontrol_of_insect_pests.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/rovikibixu/beethoven_pathetique_piano_sheet.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_off0000c5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C4 5372 bytes
SHA-256: 1fa3d7c670b2c5e8d9fc2d5f94f4944de132226d037631b23bb4c01a614be0f5
font_01_sfnt_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 10540 bytes
SHA-256: 3e8db14d668b35f2e2e30f1701b28caa8f37d364995677b1405339b066a2443c

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