Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71551ea3f9ae728…

MALICIOUS

PDF

85.2 KB Created: 2021-06-08 19:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6ab8119d40be6cdc80cdd442eace88af SHA-1: ca36d26f822ccf250dd8912048c9a99f0c77aacc SHA-256: d71551ea3f9ae728889b5d62aa88d11b327458ddfa20fe5aeb201a85ae4004ba
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains multiple external URIs, including one pointing to 'queure.ru', which is likely part of a phishing or malware distribution scheme. The presence of a 'download button' heuristic further suggests a lure to download a malicious payload.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/pbw?utm_term=auto+aimbot+pubg+mobile PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388611/normal_6005786748e7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389095/normal_600783010b4e2.pdfIn PDF document text
    • https://xakivemo.weebly.com/uploads/1/3/0/7/130739368/3956349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_6014a0645247a.pdfIn PDF document text
    • https://zagefejov.weebly.com/uploads/1/3/2/7/132710748/4152624.pdfIn PDF document text
    • https://pexesalakodosok.weebly.com/uploads/1/3/4/6/134650812/kixevox_lokebekowitowu_wevape_riwutobutetopep.pdfIn PDF document text
    • https://tofuxatedev.weebly.com/uploads/1/3/4/7/134706151/dojufaxuwejaka.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://jorowad.pbworks.com/w/file/fetch/144707217/pursuit_of_happiness_full_movie_dailymotion_hd.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/f/vipasamavewoliluvoza.pdfIn PDF document text
    • http://jadubunid.pbworks.com/w/file/fetch/144671487/figasaxebudako.pdfIn PDF document text
    • http://nibokuwogi.pbworks.com/f/how_do_i_spawn_my_helicopter_in_gta_5_online.pdfIn PDF document text
    • http://dipoziw.pbworks.com/f/tisizuwifudopafivir.pdfIn PDF document text
    • http://gatunam.pbworks.com/w/file/fetch/144614631/monerowe.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/why_the_hell_are_you_here_teacher_unblocked_reddit.pdfIn PDF document text
    • http://memofemovo.pbworks.com/f/best_celebrity_voice_changer_app.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/f/how_to_apply_botcho_cream_for_effective_results.pdfIn PDF document text
    • http://rukutuxeriro.pbworks.com/w/file/fetch/144554859/mivomifejudogisiba.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF945 4772 bytes
SHA-256: 90d5f86e2d59eada702e6a1b7eecc115068015181bd64e6378e53251dd0bdaaa
font_01_sfnt_off00010981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10981 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0001120f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120F 11192 bytes
SHA-256: f0d2b6383e8ad55302f2990540158d856344e616f2a8268d0e93a0c841c8ce1f
font_03_sfnt_off00013828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13828 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378