Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44a7105654a03b6…

MALICIOUS

PDF

81.0 KB Created: 2021-03-01 19:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3b238adeeddadb6adac23115632d93a9 SHA-1: 0fab2dea20744cb7f8d5acea19ce379a0b0a1a56 SHA-256: c44a7105654a03b67dc1378c3a2665d94c1db5d728e637676db1790c881228fb
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a website promising '8 ball pool unlimited coins apk'. This, combined with heuristics indicating the PDF is a link farm on disposable hosting, suggests a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to drive traffic to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=8+ball+pool+unlimited+coins+apk+4.2.0 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456128/normal_6011c8f71469f.pdfIn PDF document text
    • http://doxulim.iblogger.org/kolid.pdfIn PDF document text
    • http://tehnoprom.org/fawikepeweloxukitama68pi.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/Jsiacjd/the_trial_of_the_chicago_7_review_variety.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/1jcgygc/98619901778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_60220e7de5533.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/DYjdgfX/pixel_art_minecraft_software.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/GqggCjg/jokisuxar.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/0icIRjL/sekonubifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_6020263a298a2.pdfIn PDF document text
    • http://igonlinesupport.com/if_u_dont_have_time_for_me_quotesnka56.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/figugipopar/yealink_w52p_cordless_phone_user_guide.pdfIn PDF document text
    • http://dulubuli.rf.gd/mc_command_centre_guide.pdfIn PDF document text
    • http://vogidide.epizy.com/how_to_use_shark_portable_steamer.pdfIn PDF document text
    • http://legibevisavu.epizy.com/63001553950.pdfIn PDF document text
    • http://zobovobewuw.epizy.com/zibobobibizategob.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/guidecraft_media_desk.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/vidmate_hd_video_er_live.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_off0000fd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1E 5820 bytes
SHA-256: de9c809d0fbe13dc8f222e55c5e393f01bd973ec5df9da604c2a235443cc38dd
font_01_sfnt_off000110e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E3 11068 bytes
SHA-256: 47998678e64b5aa99b6537aa21da8146800ee7ea0d570673be74c775be090ebd

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