Malicious PDF — malware analysis report

Static analysis result for SHA-256 8394b7feae3be833…

MALICIOUS

PDF

76.0 KB Created: 2021-03-15 11:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d241ff69100edc2c659d9341d715975 SHA-1: 1bbd2a7ae056b9169a6e3fda19bc0d9a803f96fa SHA-256: 8394b7feae3be833ae7053e2027a1bb9ba2a14136cc4ace09538c079d9ff4b4e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to replacing Xbox controller batteries, directing users to a malicious URL. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+replace+batteries+in+xbox+one+controller
    • https://cdn.sqhk.co/feluxolid/jgd2phb/crystal_reports_tutorial_visual_studio_2013.pdf
    • http://logmeinnow.xyz/7131957687l9ic9.pdf
    • http://sosyaltakipcipanelin.com/33048310731ebhff.pdf
    • http://torchqbfl.fun/brother_hl_2140_toner_cartridge_pricez7yk3.pdf
    • https://cdn.sqhk.co/webegodebav/BihicjI/16521918476.pdf
    • http://pshcomonhere.xyz/puserugasu1i3wy.pdf
    • https://cdn.sqhk.co/bepotedaxus/hdPhchd/21132597390.pdf
    • http://ovca.space/1129357014d2sjx.pdf
    • http://kataeta.club/noco_genius_repair_mode_agmteom8.pdf
    • https://tetufimaburovi.weebly.com/uploads/1/3/4/0/134098130/1601218.pdf
    • https://sirewuri.weebly.com/uploads/1/3/5/2/135298631/e4a9b46400.pdf
    • http://natnat.fun/50748233744624ss.pdf
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/3906073.pdf
    • http://gepokupaburorew.mywebcommunity.org/80761566334.pdf
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/4380818.pdf
    • https://cdn.sqhk.co/poronujefino/ijNhbjj/pewozelojuvuvogeratu.pdf
    • http://joy-todays.online/google_chrome_versi_terbaru_offline_installermbwig.pdf
    • http://naturaitalia.space/najazumixuxitujjxral.pdf
    • https://viluvaxev.weebly.com/uploads/1/3/5/9/135974466/3620702.pdf
    • http://mitisavad.getenjoyment.net/vuvibilavewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zalomi/marketing_tools_and_techniques.pdf
    • http://fepetixapokurob.myartsonline.com/zowafimipukifoderenuki.pdf
    • https://s3.amazonaws.com/sazixipame/betternet_4._6._1_mod_apk.pdf
    • https://s3.amazonaws.com/salade/jazud.pdf
    • https://s3.amazonaws.com/jonora/71173426665.pdf
    • https://s3.amazonaws.com/wowonesoribu/business_card_template_for_catering_services.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec62.bin
2791fa98848d93447ff6b70e3150377e9bee2d24cf7fe2cfadc78a35e2356662		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 5188 bytes
font_01_sfnt_off0000fe1f.bin
3cb7a7abf9e741f4bd2077386cbfeaff57e0f6cbbac267775ab5e92e2c52b288		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1F 10560 bytes

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