Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34de24177c787a9…

MALICIOUS

PDF

75.6 KB Created: 2021-03-18 13:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 92d24f411a3d0d9b4513c5edb387f7e3 SHA-1: 257f37de56b14bff3e465a6ff4ba5af8656215c9 SHA-256: c34de24177c787a9454ea32b02d05f821252c4141d8a118f387fb67928bb6d91
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=singer+tiny+tailor+bobbin PDF link annotation
    • http://roxedizusugu.mywebcommunity.org/quantum_field_theory_and_the_standard_model_problem_solutions.pdfIn PDF document text
    • http://tazanup.mypressonline.com/68576753907.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/162209760107gshy.pdfIn PDF document text
    • http://hushseo.online/gadibitqy43w.pdfIn PDF document text
    • http://balifruit.com/libro_de_los_caballeros_templariospobyx.pdfIn PDF document text
    • http://misstourist.info/38905344964erdjx.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/how_to_draw_a_photo_in_procreatea3x2q.pdfIn PDF document text
    • http://fanuvazav.scienceontheweb.net/oral_presentation_rubric_elementary.pdfIn PDF document text
    • http://nawemofukewo.medianewsonline.com/valodunikuki.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/34189876705.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/ef940d4e-9284-41cd-a2cc-f67582645d83/rawasubuwetisemuge.pdfIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_ae7cc3a5e51544aebc3c0ff99cafa06a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d4b8d3-245f-4bdb-bdde-6054859a011c/microsoft_word_2010_selection_is_locked_how_to_unlock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196bf084-efb8-4097-affc-0b83e9ffeae5/70322799120.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/dbt_therapy_definition.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_0d28fac70b6440d08d0044873176249e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c0cd6ef-0c3a-4c8f-8775-0351a06b56ec/troy_bilt_storm_2410_carburetor_cover_removal.pdfIn PDF document text
    • http://xepuzakudera.atwebpages.com/bikot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26750b2-63c2-4a88-9c53-cfe73b144d77/2679592769.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_c1fbc52c59de410bbaf19069dcf5677e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bb3e45c-15c2-4eb3-8497-69add2250248/how_to_train_your_dragon_book_of_dragons_full_movie.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_3fef893407104fee81be66d8788b51c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc190b55-fc17-4e44-aa8b-53501ccd934a/1997_ford_f350_rust_repair_panels.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_acfd0a40357c430ab8e05519dbee11f6.pdf?index=trueIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/98194814471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26084701-48b8-4b14-8f6b-6bb19ac81e5c/65364180188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beec6dd2-3f75-41a1-8a5e-28fc21796b8c/seeded_glass_bell_jar_pendant_light.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_off0000e979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE979 5020 bytes
SHA-256: 33572455744c6377a34211b3cfc66fa0eac280b1a9ba0155c075687ac450459a
font_01_sfnt_off0000faa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA3 11224 bytes
SHA-256: a7a841f70cde6a0cfa64731b7dd8d885413af3195fbb1ff170c9a4bc5b07ac8f