Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c30ba6ca80b7e7a…

MALICIOUS

PDF

76.0 KB Created: 2021-03-24 13:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 001dd0c2f0da53ae8a2e60f5f703f79e SHA-1: 49b8854acc6f0ad96df11525bf37770ed855b091 SHA-256: 4c30ba6ca80b7e7a737ae082ed186ac364cf4cc40224e8cd2446cdf2dfadef85
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with several pointing to disposable domains and link farms, indicating a likely attempt to manipulate search engine results or redirect users to malicious content. The PDF's structure and embedded links suggest it is part of a larger campaign to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/award?keyword=hip+adductor+exercises+pdf PDF link annotation
    • http://tibudirowe.mygamesonline.org/mini_cooper_service_light_meanings.pdfIn PDF document text
    • http://pumba-timon.space/keponutezivoteviguguwu8m85.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/zowelutezufewijekivufil.pdfIn PDF document text
    • http://domobifotuza.sportsontheweb.net/how_to_deal_with_the_fear_of_death.pdfIn PDF document text
    • http://duwuzoruperiged.scienceontheweb.net/41779057031.pdfIn PDF document text
    • http://reduslimer.website/what_eats_lanternfly_nymphscgzxo.pdfIn PDF document text
    • http://daritibule.iblogger.org/danby_designer_mini_fridge_manual.pdfIn PDF document text
    • https://lizekolu.weebly.com/uploads/1/3/1/3/131379949/d975b32b.pdfIn PDF document text
    • https://getaforufuzok.weebly.com/uploads/1/3/4/7/134733873/nimifatigu_penisavebemaj.pdfIn PDF document text
    • http://businessmentality.com/sofewakififegezakokai3ezy.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/77026814850.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/77411297690.pdfIn PDF document text
    • https://tufelonidozuwux.weebly.com/uploads/1/3/2/6/132681512/xafixazisexoz.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/lazolu/brookfield_community_school_chesterfield_sixth_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/autodesk_fusion_360_full_version_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/nivodaxanidosisijubejoz.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/ruserawuxutijet.pdfIn PDF document text
    • http://dabesajunelazul.rf.gd/47670435212.pdfIn PDF document text
    • http://mibaxeruwo.epizy.com/husky_air_compressor_portable.pdfIn PDF document text
    • http://fipabadidori.epizy.com/2004_dodge_ram_1500_slt_truck_bed_for_sale.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_off0000ee8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 5148 bytes
SHA-256: b20b90045efa0a439e9a6e47f43c1da7d7eb8f85744b26eef335229ae313e2d5
font_01_sfnt_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 10148 bytes
SHA-256: 1bfe949727d698d757b1bea6b51fe76565635c25d50ff96cd9d0997bdf32787f

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