Malicious PDF — malware analysis report

Static analysis result for SHA-256 95881d0e5b06fbb3…

MALICIOUS

PDF

87.2 KB Created: 2021-03-01 19:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 035329ef271d4b67190b217d2ad8a5c5 SHA-1: 130ad19bc40e37062f88c97a873c9dc63e862e6d SHA-256: 95881d0e5b06fbb3be98ce0977c6132d0abd892731ea0d0c2c3398dd5f062d75
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, appears to be a lure related to connecting a Bluetooth speaker, likely to trick users into clicking malicious links. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/aws?utm_term=how+to+connect+to+sharper+image+bluetooth+shower+speaker PDF link annotation
    • http://natur-bio.space/judith_jarvis_thomson_a_defense_of_abortion_reddit5awif.pdfIn PDF document text
    • http://meinekarten.best/3460381532057hmy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413842/normal_5feb446f1eec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_6015dd80eb214.pdfIn PDF document text
    • http://jobware.pro/dragon_ball_raging_blast_2_cheats_xbox_360tfyyb.pdfIn PDF document text
    • http://fishland.store/paralisis_cerebral_infantil_clasificaciongmwu2.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/27247663197.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385030/normal_5ff0b3acd62d7.pdfIn PDF document text
    • http://reetodo.online/army_dispatch_procedures_powerpoint1q6aw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_5fc761dce4782.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/95028024956.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/29476754297.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/rubutigogifijafenonuji.pdfIn PDF document text
    • http://guwidovu.rf.gd/ramosimugudojufumikigare.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/fajugimibire.pdfIn PDF document text
    • http://nekezoxugi.rf.gd/somoponutezi.pdfIn PDF document text
    • http://pepukogabam.rf.gd/17376028076.pdfIn PDF document text
    • http://famebod.epizy.com/gemabemezidezurigamox.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/effortless_english_full_2017.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_off00011547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11547 5604 bytes
SHA-256: 7859acde158a28e3eed88f901d359b33485b26423af8d4e3520aa9d177aa00ca
font_01_sfnt_off0001283a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283A 11328 bytes
SHA-256: 19b7f93a431b37198f305d54f8a0d78e6412d3ab03881abd2d0c65dac48f6749

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