Malicious PDF — malware analysis report

Static analysis result for SHA-256 107d8696b26472e0…

MALICIOUS

PDF

78.8 KB Created: 2021-02-21 20:06:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5bcd15c27ce9352cacd9a74e77ebdc3a SHA-1: 16bb0e4cbf71c46fac47377ccf9b3f7f08ec7ef3 SHA-256: 107d8696b26472e01045be2043c87810600d48edef1546438d8ccdb5fd08e13c
134 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://maypoin.ru/wb?keyword=how%20do%20i%20change%20my%20bluetooth%20to%20english PDF link annotation
    • http://brettlockhart.com/behavior_think_sheet_middle_schoolbkepq.pdfIn PDF document text
    • https://gusijanuvo.weebly.com/uploads/1/3/0/8/130874241/4895987.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/j6qGjd5/58293108704.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/gfggDRx/bidavisafilinob.pdfIn PDF document text
    • https://cdn.sqhk.co/fagijopi/idpqjd7/ruken.pdfIn PDF document text
    • http://nout-sale.site/introduction_to_distributed_algorithmsd3g04.pdfIn PDF document text
    • https://tofikopu.weebly.com/uploads/1/3/1/3/131381225/bbec798.pdfIn PDF document text
    • http://familyit.info/vojanelutopibunerb88l5.pdfIn PDF document text
    • http://fogugevup.22web.org/tokixewozogasolanomese.pdfIn PDF document text
    • http://ru-payment.casa/antenna_and_wave_propagation_ebookxmc7t.pdfIn PDF document text
    • http://amorexpo.com/47463048384syait.pdfIn PDF document text
    • https://setabuzi.weebly.com/uploads/1/3/0/7/130775645/2855869.pdfIn PDF document text
    • http://universityru.fun/math_equation_meme_templateam29e.pdfIn PDF document text
    • http://reweder.site/jusolewarig4ypeu.pdfIn PDF document text
    • https://cdn.sqhk.co/boxadiweteve/gdZgchd/neturo.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://kuzekatowo.rf.gd/bts_epiphany_piano_sheet_music.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_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 3340 bytes
SHA-256: ab9d4ac3b9d9b589c71c00d4b821955531e38b8a9bbfc441b8c6d7092fcced28
font_01_sfnt_off0000e8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 5436 bytes
SHA-256: 808557a72802a2fdbcea9947d6913af9c35827b8627fb9f1ac47b6bc64e8a229
font_02_sfnt_off0000fb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB31 10592 bytes
SHA-256: 9cf9a3265b82264cdd0bb4d3689ed27b689615956dfb83aea61689a263762493
font_03_sfnt_off00011f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F78 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.