Malicious PDF — malware analysis report

Static analysis result for SHA-256 c983aef74b2fea49…

MALICIOUS

PDF

74.3 KB Created: 2021-02-10 20:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ff04a77ce831a91bb02c641d6cacb829 SHA-1: 72289557236d774787783d6073690943e9b6b901 SHA-256: c983aef74b2fea4972f1858751344a0ad9e9e71114f26b5bb9d03386d06f786d
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and impersonates the WhatsApp brand for credential phishing. It contains numerous external links, many pointing to redirectors or potentially malicious PDFs, suggesting a phishing or malware distribution campaign. The embedded URLs and the overall structure indicate an attempt to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dibotora.weebly.com/uploads/1/3/4/8/134870334/kemupetiloxude.pdf.
  • 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://bologen.ru/aws?utm_term=baixar+whatsapp+gb+atualizado+2019+apk PDF link annotation
    • https://cdn.sqhk.co/tusadopovet/ctiepjb/58447553685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467927/normal_5fe98f313f269.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/kemupetiloxude.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/eOO2sV7/hoops_arcade_game_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/ge7lHjb/wordscapes_level_8525.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/jPgghd2/battlelands_royale_season_12_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/ejim9hj/xizixezopovolipobo.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/hhHhbgj/66348595546.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/wZgfhc2/clock_face_generator_roman_numerals.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421959/normal_5fe42ac4792ae.pdfIn PDF document text
    • https://difivasopiv.weebly.com/uploads/1/3/4/5/134599246/4539690.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/didowugorokirug/bojifo.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/score_match_perfect_formation.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_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 6164 bytes
SHA-256: 109ca4e666ed438bb03dff1e52176121883860e3878ecc08c53549dcd8332052
font_01_sfnt_off0000f7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 10736 bytes
SHA-256: da081fed8148977c0911367339e263a9cb5bf11f4cf3994479bd6b542f01c58d

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