Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f26a179299bc2f…

MALICIOUS

PDF

80.2 KB Created: 2021-05-15 15:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3ebcf23b3b65973e557215c53b34923c SHA-1: d75af8194f48cc82120eb7ad74fffed6d4a61f38 SHA-256: 94f26a179299bc2f61ee74028f02ed9e54e678300f597f0a5645fd6f1352668b
166 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and employing UTM parameters, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or phishing sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://druttle.ru/strik?utm_term=what+does+galarian+mean+in+pokemon PDF link annotation
    • http://baugroup.info/xopivivonavema7jg7.pdfIn PDF document text
    • http://bioforcecolumbia.site/nfl_schedule_2015_week_7_oddsu62ot.pdfIn PDF document text
    • https://sojenumodab.weebly.com/uploads/1/3/5/2/135296615/sikibodosanux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_604d1f648e2b7.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/monatulodizuxuw.pdfIn PDF document text
    • http://groby-ritual.online/gast_vacuum_pump_model_doa-p704-aamqu5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_603c3003ac2c3.pdfIn PDF document text
    • http://vehicleinsusa.com/fake_book_boxmtocb.pdfIn PDF document text
    • http://mexicotop.xyz/english_for_ethiopia_grade_10_textbook5p614.pdfIn PDF document text
    • https://xuwazoleludike.weebly.com/uploads/1/3/4/3/134325396/xorexariruxozuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_605ba4f89d7ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5fda64e1a849d.pdfIn PDF document text
    • http://roflan.site/dnd_5e_wizard_healing_spellsw1fka.pdfIn PDF document text
    • http://bazis-rostov.com/meade_ds-114_pricekqb7d.pdfIn PDF document text
    • https://bazunebusa.weebly.com/uploads/1/3/5/3/135397504/331165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_60377f0c8619f.pdfIn PDF document text
    • http://spainsale.pro/boss_gt_1000_dimensions1qbd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_606616ab83888.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486193/normal_6001ff97d85ed.pdfIn PDF document text
    • http://megahit.space/zobenobaperozenaropibukevngtpr.pdfIn PDF document text
    • https://tumizoma.weebly.com/uploads/1/3/2/8/132814974/kabipexige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_5fd73c062d323.pdfIn PDF document text
    • http://migerov.xyz/173512191931tozk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367947/normal_5ff313db55495.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdaee621-1e23-429d-bc40-313871455001/jefilumepisad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa8c330-359f-42d4-a81b-38ed84927a68/20820726377.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_off0000fa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 5452 bytes
SHA-256: ea1dd75d05daf8798f12a905286610d335f7bf245555454f5191b11fad456b3f
font_01_sfnt_off00010cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD3 10732 bytes
SHA-256: 1a430aff3b60d9b936d49ccbf9db9a7308ab4e3c095af1a5a4f3060139907622