Malicious PDF — malware analysis report

Static analysis result for SHA-256 3daa18ec185da720…

MALICIOUS

PDF

85.9 KB Created: 2021-04-02 15:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 30f75725363a11e7cd14eb74b4a0d852 SHA-1: 54032ddb5a6ae7f0bc21775f145b6853143617d5 SHA-256: 3daa18ec185da720b53e750a787eb1663533a7d88950de834070deba03a1b498
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 0.9925

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://soxebez.ru/123?utm_term=free+proxy+vpn+apk PDF link annotation
    • https://cdn.sqhk.co/jojipimuve/h8jeSia/28912545953.pdfIn PDF document text
    • http://kmplitka.shop/what_does_tfj_mean_alpha_xi_deltadu1xv.pdfIn PDF document text
    • http://wojournal.ru/28237078360pf566.pdfIn PDF document text
    • https://vopifubuk.weebly.com/uploads/1/3/1/6/131636719/lezali.pdfIn PDF document text
    • http://bio-ita.fun/cgeit_7th_edition96nbl.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/djijd7J/63923894931.pdfIn PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/8424196.pdfIn PDF document text
    • http://clientesdkb.com/zewumomoxipiwodoyfyed.pdfIn PDF document text
    • http://s7hmus.org/vujotipiwimazoc3ijs.pdfIn PDF document text
    • https://zulovinivu.weebly.com/uploads/1/3/4/7/134758195/7267785.pdfIn PDF document text
    • https://gidaxejopof.weebly.com/uploads/1/3/4/3/134305554/pimup.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/ijij2hj/28426772207.pdfIn PDF document text
    • https://cdn.sqhk.co/guzoladip/hyhexhi/microsoft_advertising_jobs.pdfIn PDF document text
    • http://lastmarkt.ru/expanding_and_simplifying_brackets_worksheet_gcse63l85.pdfIn PDF document text
    • https://foraketarikovef.weebly.com/uploads/1/3/4/6/134608655/getoxenuguva.pdfIn PDF document text
    • http://bigswinner.space/13326946024t7816.pdfIn PDF document text
    • http://vesefotaso.iblogger.org/11490480241.pdfIn PDF document text
    • http://lessonsonline.site/google_play_games_free_for_pc5vcem.pdfIn PDF document text
    • http://verenica.net/juzotevosojuwar5qh.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/jbhjjjH/sharpening_steel_serrated_knife.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/a200348f-2f37-4219-ba85-3d753dd83d21/wimopaxubemutevi.pdfIn PDF document text
    • http://dowupozor.epizy.com/xokip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b875b726-90fc-4562-a585-9dad7720da22/6846699091.pdfIn PDF document text
    • http://dalufiba.rf.gd/38222519760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1336b9e3-8cde-4612-b548-fdbc23ffb905/how_to_troubleshoot_amana_washing_machine.pdfIn PDF document text
    • http://jurorinidup.rf.gd/51781435001.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 2912 bytes
SHA-256: ca76997379172eee33085c8482c7323aa4c6490e5d9b0518affecd078e7eaab7
font_01_sfnt_off0000f9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D6 4852 bytes
SHA-256: e9abdfd0ebcdf01f0dcfba1f73ea4701f4100527c3aff4355045370d6a9040d4
font_02_sfnt_off00010a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A78 11560 bytes
SHA-256: 1778108993883c7991d9b8806d11428d63823e6896ed89fba4d2a1a2b950617a
font_03_sfnt_off00013246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13246 16204 bytes
SHA-256: 9f650169421b0b7087dd31af68adb40091046a2bb8e16b0442b6a694d872da2e