Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf05c2fbda7dce2…

MALICIOUS

PDF

88.6 KB Created: 2021-05-01 09:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6a61a4f2b960eb52b6305be92cd309a5 SHA-1: 95d2f0bbbcd5afa28998de697c91f0a9cda81343 SHA-256: 2cf05c2fbda7dce208ed122904f894af24a62ff160bd88b9209fb2b4425b95ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=officejet+pro+8600+not+printing+in+color PDF link annotation
    • https://cdn.sqhk.co/kukelagalefe/fhfZFXm/12970017040.pdfIn PDF document text
    • http://instahelpforbusiness.com/chicago_manual_of_style_17th_edition_citation_examplee8v58.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/hjzjggc/baixar_traffic_rider_dinheiro_infinito_2020.pdfIn PDF document text
    • http://allfreebets.ru/chrome_storage_sync_getshhor.pdfIn PDF document text
    • http://chisto-chisto52.ru/metro_2034_audiobook_plgv48i.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/hijiigy/beats_audio_control_panel_hp_envy.pdfIn PDF document text
    • https://cdn.sqhk.co/japedovak/ibjcXUU/vojatop.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/ehWMjel/rivewarikusekiz.pdfIn PDF document text
    • http://spainsale.pro/71435734163rx721.pdfIn PDF document text
    • http://lightstart.xyz/210183827740natb.pdfIn PDF document text
    • https://cdn.sqhk.co/zutomina/TidGge3/xubuwituwadejok.pdfIn PDF document text
    • https://cdn.sqhk.co/wemerofada/XRlgggi/fesoribotemul.pdfIn PDF document text
    • http://fherixq.com/loi_de_boyle_mariotte_exercice84cgk.pdfIn PDF document text
    • http://creditscorehelp.info/panukupar5v7e.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/hfhhAja/launcher_ios_14_luutinh_developer.pdfIn PDF document text
    • http://eroganoficial.site/wegebakoxetuxenopi9wfho.pdfIn PDF document text
    • http://fexuvukenix.22web.org/active_directory_security_best_practices.pdfIn PDF document text
    • https://cdn.sqhk.co/niduzabunu/QKAGDhg/45955831621.pdfIn PDF document text
    • http://all-system7.club/dream_piano_tiles_2020_mod_apkucsnt.pdfIn PDF document text
    • http://edayafar.xyz/us_corn_planting_reportgl1xd.pdfIn PDF document text
    • https://cdn.sqhk.co/losomilodip/FzhdezM/44942894362.pdfIn PDF document text
    • http://fkpravo.ru/detubum5o94q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nenizumudi.rf.gd/54081959118.pdfIn PDF document text
    • http://fivemawafazixi.epizy.com/12396788936.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_off00011ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACE 5388 bytes
SHA-256: d8267b5cd56e1955042a1b6c520485a9477b36cb7532085073d4a1ef95b526d4
font_01_sfnt_off00012d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D40 11692 bytes
SHA-256: ffab1063745465b041bb9a75231401391d30346b3bc8ef9a5faf9974078db328

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