Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf377c95ca2d604…

MALICIOUS

PDF

109.4 KB Created: 2021-03-22 19:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: b72e7e03cde20a11948ba94c04b8eb82 SHA-1: 5d8dd15af6ac8fa88543b732e1707e81a9b91308 SHA-256: 5bf377c95ca2d604f7f652531f2c9bb0a4bf776387e7e192b1486625afa27b21
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://golowaki.ru/award?keyword=boss+me+80+manual+espa%25C3%25B1ol+pdf PDF link annotation
    • https://jepifobowokeba.weebly.com/uploads/1/3/0/7/130776363/6936316.pdfIn PDF document text
    • http://dithetsen.xyz/673839310797iiyx.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiferufefu/BYM2ign/62530444637.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/SaMhcjj/86097609622.pdfIn PDF document text
    • https://cdn.sqhk.co/dogatefi/ihqiggh/xoxejap.pdfIn PDF document text
    • https://cdn.sqhk.co/ruduligived/Na6ge7l/fumuxafos.pdfIn PDF document text
    • https://pafetinavip.weebly.com/uploads/1/3/4/8/134868030/tiwigidorog_gupuxanixo_xuvuxixajevob.pdfIn PDF document text
    • https://ziwegakesamud.weebly.com/uploads/1/3/4/4/134468237/18c880de98dfc99.pdfIn PDF document text
    • https://liziwozubol.weebly.com/uploads/1/3/4/8/134851467/e7ff0683.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/cFSheGK/great_weapon_master_feat_5e.pdfIn PDF document text
    • http://yozi.store/how_to_unlock_acer_projector_without_remoteo3w6z.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/niaajfg/windows_10_launcher_pro_for_android_free_download.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/mojivikapeti/spanish_subject_pronouns_answer_key.pdfIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_24649fa09ee246b891c11ef325548448.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_17e8631e368943a29868a44e43ea7af7.pdf?index=trueIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_4b989ba0e3e54cf7b66c6ea440789ddd.pdf?index=trueIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_abca0d6e0e084a12acf39a37a45ad4e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/fortnite_cupcake_toppers.pdfIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_3d5a398a04544c32ab8d02113519defb.pdf?index=trueIn 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_off000166d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166D1 5688 bytes
SHA-256: 850d003ec822b125006874c968730c59c0f596160c2500825782e06072b8a0e3
font_01_sfnt_off000179d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179D7 15452 bytes
SHA-256: 890697813b47b190a55a2f0e6576f49f174ff7330bcc2276349dcd3f42c1a8e9

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