Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d2180118fc02c1…

MALICIOUS

PDF

79.6 KB Created: 2021-03-26 10:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b1926fd397f8008e1f294e3c6aecbf9a SHA-1: 26a112020a5909d7b2f99425c3afcdcd9259c05c SHA-256: b7d2180118fc02c1bcf3acd1a9297f422f4fb14b399cdd43bc2d4b7c462507f4
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution attempt. The document body, though truncated, contains keywords related to device resets, likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/strik?utm_term=how+to+factory+reset+an+rca+voyager+tablet PDF link annotation
    • https://cdn.sqhk.co/tororukiwuri/ijjqgeu/pegiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496828/normal_6054403585763.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/20645498037.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498994/normal_5fc738b0b9d59.pdfIn PDF document text
    • http://axecheat7.xyz/tedalabw2c4.pdfIn PDF document text
    • http://vkysnaya-eda.site/how_to_install_directv_app_on_ipade7p0w.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/karcher_repair_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_60387ff91d6e9.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/jhfhhgg/wonka_s_world_of_candy_match_3.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/jgziger/crazy_racing_multiplayer_apk.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/92215751756.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/cogitamus_bruno_latour.pdfIn PDF document text
    • http://tihefers.online/sundara_kandam_slokas_in_englisha4b0s.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/spirited_away_one_summers_day_guitar_chords.pdfIn PDF document text
    • http://prolac.ru/vujetiropidoqr86.pdfIn PDF document text
    • http://quinzsy-studio.design/employee_performance_reportvhrgj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465006/normal_600634c9ddb90.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/RBiiijg/20169000430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_602519ea4f6b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimixof.onlinewebshop.net/como_trabajar_autoestima_en_adolescentes.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/61223996596.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/70807147772.pdfIn PDF document text
    • http://tirisesu.onlinewebshop.net/14151775073.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/vijedisubugek.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_off0000f988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF988 5404 bytes
SHA-256: 1904a846174c39afb3f6f45285e52cd926d20c3cc39796098cb6bf3275f4e6ad
font_01_sfnt_off00010c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1F 11032 bytes
SHA-256: c3d7588744eab2c49d7da4cfcfe3a8ccf75f1f3dc2e5f090e060030c492feddb

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