Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a96bdac0bfbcfe7…

MALICIOUS

PDF

80.0 KB Created: 2021-03-13 16:13:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7478dd65c16bdba4d8681dba5330b83b SHA-1: 0beb1c84095f263e6438b3894f2e61ddac64ecf9 SHA-256: 1a96bdac0bfbcfe736b1c59bd793c5a223a07bff467cb642ad17b7fb6c945158
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a high volume of links on disposable domains, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/award?keyword=op+amp+ic+741+datasheet+pdf PDF link annotation
    • http://mitedujonajezed.scienceontheweb.net/41560228587.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/tarulal.pdfIn PDF document text
    • http://tavegumata.sportsontheweb.net/43435778915.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/sugikopiziriki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_5fd0e4e670605.pdfIn PDF document text
    • http://linza.media/the_way_of_kings_book_12d26w.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/start_late_finish_rich_free_download.pdfIn PDF document text
    • http://extrameets.fun/apollo_18_imdb_parents_guidevwprk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_601411ad9864d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447437/normal_60014818810b6.pdfIn PDF document text
    • http://xokezuwadem.mygamesonline.org/rekijaxixisazixadazexatox.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/duzazuvafupumika.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/samsung_bd-p1590_blu-ray_player_remote.pdfIn PDF document text
    • http://naturaitalia.space/android_google_maps_simple_exampleu5dio.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/boporidaxufexiruribo.pdfIn PDF document text
    • http://rutabeno.22web.org/1-_60_horde_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503987/normal_603abeb1f0288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejegaba.atwebpages.com/kenmore_front_load_washer_leaking_from_filter.pdfIn PDF document text
    • http://bibesatu.epizy.com/newetiwosafevemiwez.pdfIn PDF document text
    • http://sebiruraxevap.epizy.com/venekuri.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/76308376140.pdfIn PDF document text
    • http://gakajitaju.atwebpages.com/farmall_super_a_3_point_hitch_kit.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_off0000e56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56A 4324 bytes
SHA-256: 387b26476d1262560b0a45b5aca819c801929f59a3cce9c721e577a7f827f19e
font_01_sfnt_off0000f4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B8 5512 bytes
SHA-256: ba7919141af172cd3e34398fec4ba67a6acaece12c1a8a2e8d7dc77374b6b947
font_02_sfnt_off0001076b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076B 13112 bytes
SHA-256: cfbfc260ececc8294a97c80396172079ffc4d8075c6fa88999eaf0a4b40673e4

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