Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3acd8255db7691a…

MALICIOUS

PDF

75.1 KB Created: 2021-02-21 03:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d1f1cdd65cbe06c5374dfa9ddc736416 SHA-1: d70d4eebbc1e9df17031678e8eb6858a992012e7 SHA-256: f3acd8255db7691aefa2197a8559829af0cafc2dd0a297d74a4d10eb68af18fe
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, with one prominent URL pointing to a suspected phishing domain. The PDF's structure and embedded content suggest it is designed to trick users into visiting a malicious site, likely for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=faiths+of+eberron+3.5+pdf+ita PDF link annotation
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/kajamijunefibepiw.pdfIn PDF document text
    • http://mini-cam-v2.club/whirlpool_fridge_ice_maker_removal2ntb3.pdfIn PDF document text
    • https://xefanopebowemid.weebly.com/uploads/1/3/2/6/132681782/1429550.pdfIn PDF document text
    • http://monoga.space/axis_mf_sip_stop_form4mlkq.pdfIn PDF document text
    • http://nosinoski.shop/696574574839g3xv.pdfIn PDF document text
    • http://bemigovoso.iblogger.org/dibukubawobopadesup.pdfIn PDF document text
    • http://morj.space/pharmacist_experience_certificate_sampleqbdst.pdfIn PDF document text
    • http://thedefenseforge.com/86306933362zx0hk.pdfIn PDF document text
    • https://lovebaxubifutu.weebly.com/uploads/1/3/4/3/134322000/2242c.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
    • https://s3.amazonaws.com/vavale/45602777704.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/fanalojidiwipurakakavalu.pdfIn PDF document text
    • http://goxakimolo.epizy.com/98838183149.pdfIn PDF document text
    • http://mafekebokidodat.rf.gd/33007217601.pdfIn PDF document text
    • http://fifaleniw.epizy.com/59924295980.pdfIn PDF document text
    • http://nozefemalevarug.rf.gd/dolona.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/complete_blood_cell_count_report.pdfIn PDF document text
    • http://nalujisutu.epizy.com/retepojeto.pdfIn PDF document text
    • http://jopodovijub.rf.gd/information_and_communication_technology_meaning_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/47298382331.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA70 5300 bytes
SHA-256: e2d33fab611a6378e6b3f6dba5ab22106fb21b85b7aed7bbed122bdae900cec6
font_01_sfnt_off0000ec66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 10684 bytes
SHA-256: 7bbb4d36ebaae10adadeea37e763ccd1e8c04836032d848e94e6ad4349c59d21
font_02_sfnt_off000110c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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