Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37fe8b701de969e…

MALICIOUS

PDF

81.5 KB Created: 2021-03-10 18:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 599bb3218d2569ff72c223321d7fd8a0 SHA-1: 8d465f5f5c88b9b5db1f6e626fd33a07cba0fcd5 SHA-256: d37fe8b701de969e5af360546f0ecef2c89749937b3a559916bdf5ff2b5a16ef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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/123?utm_term=the+others+imdb+parents+guide PDF link annotation
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/374222.pdfIn PDF document text
    • http://wosedumuf.mywebcommunity.org/65785639320.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500877/normal_5ffad24291981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_603b11c7d1e5b.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/schwinn_570r_vs_270.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/mawapune.pdfIn PDF document text
    • https://gewifikapogesel.weebly.com/uploads/1/3/5/3/135351592/moxifepijopag_givamebigokezaj.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/29738835529.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/fantastic_beasts_and_where_to_find_them_characters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5ff8a383171d1.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/eyelash_extension_classes_orlando_fl.pdfIn PDF document text
    • http://tagoturuluro.medianewsonline.com/ap_grama_sachivalayam_model_papers.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/netgear_jgs524v2_price.pdfIn PDF document text
    • http://vevaroda.scienceontheweb.net/par_quoi_remplacer_beurre_tartine.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/zawiminamuvebadigibito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_601712dbc4af1.pdfIn PDF document text
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/90d2674ce6b3.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/60470440413.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/37201628779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469630/normal_5fd92e4e76cf0.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/47498126842.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
    • https://s3.amazonaws.com/zumomasugipeno/celi_4_esame.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/gizavubevaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/gunners_dream_piano_sheet_music.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/dd-wrt_repeater_mode_not_available.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/flat_stanley_book_review_template.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/autopsy_report_sample_nepal.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_off0000f236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF236 5312 bytes
SHA-256: 9778d795968d2686f98c8ee3c2ce844eb0d6581e9d5905e4201ce0e9d6d7cb65
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 11564 bytes
SHA-256: 6ce420eeb7eb4ac4cd424bbec95a3b5e3256d00c2a403f2bfb0eafae27187423
font_02_sfnt_off00012a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A19 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378