Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1726a732cd69ae…

MALICIOUS

PDF

78.1 KB Created: 2021-03-07 23:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d78dadde5463a82471a1b27a92524880 SHA-1: d093c7233dc1ac81ef089cb947aa08e661e6c901 SHA-256: 7c1726a732cd69ae1e59a9bdc44b170df64f173ac614edfb050476e31fd52f09
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, with one specifically appearing to be a lure for users searching for IP address information. The PDF's structure and embedded links suggest it functions as a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://golowaki.ru/123?utm_term=how+do+i+find+my+ip+address+and+port+on+windows+10 PDF link annotation
    • https://cdn.sqhk.co/zodozane/ihgTjiI/nolanugitanilalat.pdfIn PDF document text
    • https://cdn.sqhk.co/jilowepe/ubiagxM/stackable_rings_gold_silver_rose_gold.pdfIn PDF document text
    • https://cdn.sqhk.co/razupojoja/Djazosk/23223399356.pdfIn PDF document text
    • http://xupulakikovuxo.mypressonline.com/xipepe.pdfIn PDF document text
    • http://fopesekebamit.22web.org/copd_exacerbation_treatment_guideline.pdfIn PDF document text
    • http://bobixuposu.22web.org/electrical_lockout_tagout_procedure.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/aM2jdgf/58734025241.pdfIn PDF document text
    • https://cdn.sqhk.co/virapazetif/hTgcEhe/36263557478.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/8gcjdjb/lunuwusopabiw.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/dGgngHk/45338588318.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/zggiehc/cat_jumping_over_baby_gate_gif.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/32886256463.pdfIn PDF document text
    • http://loziwazekon.medianewsonline.com/xerisiner.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarimeg/b1ggeJQ/miragine_war_cool_math_games.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/8012fd83-6134-4793-a080-f9bcecd2c662/53531595950.pdfIn PDF document text
    • http://xikapewegoruzom.epizy.com/how_to_draw_a_realistic_cat_face_step_by_step_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221a18de-b4ff-4ab1-ae59-956103cbfa29/blessed_are_you_oh_lord_our_god_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f940642-8719-4c35-966e-80d3e2269bc5/how_do_fighters_cut_weight_so_fast_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a20b13-be77-438d-b5ba-ad1e50ebc886/senarubeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9f95d9-4fe5-4259-84b5-9b461ff531fc/how_much_does_a_graphic_designer_charge_per_hour.pdfIn PDF document text
    • http://tixuranezusox.epizy.com/14910411158.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/6.0_powerstroke_turbo_rebuild_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f5a81c-662a-48a0-9b10-f553e8c5aa55/renova_zero_issues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fa4c17-40a8-414a-847e-65f7fd77986f/35901606404.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_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 5504 bytes
SHA-256: f7126ce514a430fc5419964c747c1bcc85951cafbc257831894b8937cf759c78
font_01_sfnt_off00010655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 10464 bytes
SHA-256: 20714e6f3e363477ad1c88f81766a9c126b578918887ded6df7182b4a8fecfb5

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