Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaba73991caccd6b…

MALICIOUS

PDF

74.1 KB Created: 2021-02-17 20:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 271ff30a895f64d96719ba07936fbe7a SHA-1: 6a0742ad8e4e9184754deb729f8327201f25d183 SHA-256: eaba73991caccd6b420f9ba706c4766533d44cbfabf2fcd16201fca17fc46aa6
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate effort to create a network of links for deceptive purposes. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile strongly suggest a phishing or scam campaign.

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://maypoin.ru/123?utm_term=how+to+make+non-readers+read PDF link annotation
    • https://cdn.sqhk.co/xaranoraf/jffhhzB/bubble_letters_graffiti_f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421970/normal_5ffed1660c80f.pdfIn PDF document text
    • https://derugipuze.weebly.com/uploads/1/3/0/8/130814861/920045.pdfIn PDF document text
    • http://toxedajenoxin.66ghz.com/76756389426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365624/normal_5fcae6055b3a4.pdfIn PDF document text
    • http://goodnaturak.space/jipadjglya.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/2ghhjjg/share_chat_hello_video_song_tamil.pdfIn PDF document text
    • https://vepufekuso.weebly.com/uploads/1/3/0/7/130775624/1981758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_6013c141d2693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_5fd6545043436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486350/normal_5fda0fac2b9ff.pdfIn PDF document text
    • http://faceit.su/yo_yo_ho_ho_retro_platformer_apkw5u5z.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/hgibVbC/ghost_guns_legal_in_nj.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/cyanogenmod_gt-_i9060t79bp.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/jizowixazapuzilarizedanawos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baperosuvo.rf.gd/78420616559.pdfIn PDF document text
    • http://mulotuzasokafo.epizy.com/fort_lauderdale_airport_shooting_report.pdfIn PDF document text
    • http://wemubivoparuf.epizy.com/3541483502.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_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 5088 bytes
SHA-256: bb55e657c1ff1b920d0808dde4300596b6c9a07e2a6b019079d01bd85e236590
font_01_sfnt_off0000f75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75D 10456 bytes
SHA-256: d6c4cd3f8c6abb09e65ae0fc7e0a398b14f1ba46877647f542b862b35f30cdcc

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