Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba2f2181a06542e…

MALICIOUS

PDF

80.8 KB Created: 2021-04-16 15:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cec3be0f6d15651ff1977b2b41c65c1b SHA-1: 9a749ed193c43ca21f5d95310348f568fdcb361f SHA-256: aba2f2181a06542e604a4b128ee5f7d929a755f967cdf21d1c5e9643c186f219
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=swiffer+wetjet+floor+cleaner+sds PDF link annotation
    • https://cdn.sqhk.co/fuxuduxexi/ymhighI/dragon_ball_raging_blast_cheat_codes_ps3.pdfIn PDF document text
    • https://cdn.sqhk.co/xomakonezema/jgibrha/zasifego.pdfIn PDF document text
    • https://cdn.sqhk.co/gupidiroka/Wgyagg8/borland_c_dos.pdfIn PDF document text
    • https://cdn.sqhk.co/gutejalajige/dheTMij/39618866858.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/ectrodactyly_ectodermal_dysplasia_clefting_syndrome.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/jghergc/sanerejogovupowamuv.pdfIn PDF document text
    • https://cdn.sqhk.co/mojuzizimu/Qgdjije/elitserien_sverige_ishockey_tabell.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/26060342032.pdfIn PDF document text
    • https://cdn.sqhk.co/miwiwefe/CUjfbEq/spectacular_smith_net_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/hiMjjnp/difasunuve.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/Ijhygjr/rise_up_hamilton_meme.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://najukelosuned.myartsonline.com/small_restaurant_business_plan_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/por_el_placer_de_vivir_radio_monterrey.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/gpu_architecture_book.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/python_is_object_oriented_means.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/36305493047.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/89413656203.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/how_to_use_ikea_kallax.pdfIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_cec946f37ac1487395a2c07b4bcb1c5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/66157090303.pdfIn PDF document text
    • https://69a7f268-727d-4112-ba4f-a3538cc856be.filesusr.com/ugd/9a0d60_10a5a35b0c7a43a6bdecf912397efd9a.pdf?index=trueIn 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_off0000f018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 5072 bytes
SHA-256: fc2a3c0679f4e21d2439622598c43d452682f7a3fc9b8e59df69354182a0cdd5
font_01_sfnt_off00010168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 11200 bytes
SHA-256: 18c501307d21343c606015b8e328cdfa007b5e65d7a53c8711b03eb20c794c4d
font_02_sfnt_off000127b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e