Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc42efaa37784db0…

MALICIOUS

PDF

74.5 KB Created: 2021-03-01 00:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 64dc428aba7c42b4ecaca88902bd54d5 SHA-1: 3e13935087eb6c3eeeca6083322509d1085dd05f SHA-256: cc42efaa37784db05c2886d23355f73030d7d4df8daa5730b92110e32dfbece4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure for user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/123?utm_term=how+do+i+put+water+in+my+conair+steamer PDF link annotation
    • http://xawamiwupajev.mygamesonline.org/8507686493.pdfIn PDF document text
    • http://newser.site/how_to_write_a_bakery_business_proposalzmm90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369165/normal_5fcebaa57f157.pdfIn PDF document text
    • http://summ-green.fun/formulario_para_solicitar_ley_300pm6wi.pdfIn PDF document text
    • http://help-copyrighteamservice.com/empire_the_final_season_episodesexq2a.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/what_was_the_size_of_the_temple_in_jerusalem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455894/normal_6028c5c139979.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwuvume/thf1hgb/kemur.pdfIn PDF document text
    • http://mobapur.iblogger.org/12906967254.pdfIn PDF document text
    • http://visionnew.xyz/ssc_chsl_2019_question_paperowd9b.pdfIn PDF document text
    • http://missunik.space/3d_map_of_the_universehutcl.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/69369111388.pdfIn PDF document text
    • http://onlyforyou.space/forklift_training_requirements_albertau1o22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463010/normal_602a0781c7fb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5fce161ee3553.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/93614907584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 5224 bytes
SHA-256: a03f9088ac469d7516c040db9c57368e07bbb50be3050bd5891b8b054b23d2d2
font_01_sfnt_off0000eb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5E 10400 bytes
SHA-256: 86d01482c2876086a8febbdd9b04e753e8da8dc0eb771d92649b14af54b77ddd
font_02_sfnt_off00010ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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