Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e7c6a78ede7fea…

MALICIOUS

PDF

69.1 KB Created: 2021-03-01 01:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 047686bbafdbcf984ed2f2351b1c2eb1 SHA-1: 1c217c8d025074e54f51de95356622a984ef4b05 SHA-256: 10e7c6a78ede7feaaaa89e4158559f7deadb20f039679aa58eeeffd278c706a4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=spotted+lanternfly+paper PDF link annotation
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/bajebolo.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/sta-rite_pool_heater_troubleshooting_e05.pdfIn PDF document text
    • https://cdn.sqhk.co/zaxuloxedu/gfVifA5/part_time_occupational_therapy_assistant_jobs_near_me.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/tavaxikatenexulotewe.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/ek2ihja/most_popular_song_of_the_90s.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/jatuwikumufun.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/age_to_read_trials_of_apollo.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
    • http://gupizamowakop.myartsonline.com/how_do_you_thread_a_euro_pro_x_sewing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/refojopakazane.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/gawain_4_concept_definition_map_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/almaden_community_center_activity_guide.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_off0000c6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D8 4804 bytes
SHA-256: e152969af105cdaff4a03df016bbd82d419f1e5df94077122a9f60eca7bd83ca
font_01_sfnt_off0000d73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 10060 bytes
SHA-256: 69c8420b45295dd0ccdd5a1413f84c22035bb76b6bccc1d9cb0c9dc754f9b915
font_02_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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