Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc020776a6736ad…

MALICIOUS

PDF

76.0 KB Created: 2021-04-24 01:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3a7dca82ba80d96418a8b8929825068c SHA-1: 80395c04f1e0a9e5656a375b9be6c3a8bca87548 SHA-256: fcc020776a6736ad67e3a3c58e2065baacc735f67ebf9f2fec054f0384cd43a7
134 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains, and a high ML classifier score indicates malicious intent. The presence of a link farm heuristic and a ClamAV detection for Pdf.Phishing.Trojan further support a phishing and malware distribution scenario. The document body, though heavily obfuscated, appears to contain printer error-related text, likely a lure to encourage clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=brother+hl+2240+error+light+stays+on PDF link annotation
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/286b286ccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463275/normal_605e14615bdbc.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/haFJu3q/foxpro_crossfire_remote.pdfIn PDF document text
    • https://nekuferalota.weebly.com/uploads/1/3/1/4/131406939/talabo.pdfIn PDF document text
    • https://cdn.sqhk.co/fezemepusap/PjYhcia/ratofemalejikanowopara.pdfIn PDF document text
    • https://wefojomoki.weebly.com/uploads/1/3/5/3/135389947/4531471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_605dba1dce543.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/achhmUc/mclaren_formula_1_livery.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/1783946399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_6043b5a5c3be9.pdfIn PDF document text
    • http://vonexalux.sportsontheweb.net/3338318448.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385014/normal_5ffbb7c20c409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494436/normal_6037bce9b8e53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumalidik.atwebpages.com/47268109765.pdfIn PDF document text
    • http://fezisiw.epizy.com/analphabtisme_au_maroc.pdfIn PDF document text
    • http://bafopivazizaxon.rf.gd/beautiful_you_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451fb284-affe-400f-98ed-5bf72d6fcee5/sound_blaster_audigy_2_zs_sb0350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75041bba-6134-4a5c-ad36-9d309ad873d8/a_writers_reference.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d383b9a0-1029-4ee7-b4af-65bbb92a6824/abide_in_christ_andrew_murray.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099d10d3-d839-40a7-9142-004dcab6ffdb/how_to_get_rid_of_dots_in_table_of_contents_word.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/82954985554.pdfIn PDF document text
    • http://guseboses.atwebpages.com/bell_bottom_blues_chords.pdfIn PDF document text
    • http://zovopabipani.rf.gd/simulador_del_ser_bachiller_2020.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_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 5460 bytes
SHA-256: a61df0ac1d4f51cae9cb84a30b054bcbfb3b47580379a351997c50962ca1a473
font_01_sfnt_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 11088 bytes
SHA-256: 7781e0f264bdfeee07385ae73b8f1dd1b4315caa7341e0de0a2b54c9ab0c53a3