Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c1eb3550cb2fbc…

MALICIOUS

PDF

76.0 KB Created: 2021-02-07 19:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5a8c41f2ef690160aab4247637ab19e0 SHA-1: d613b057726bc0d12742387efc9c9333b69ee2a3 SHA-256: 86c1eb3550cb2fbc1d5cee4e511c01d725a155eecbd6eb5f92ea765b065ed039
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score point towards a malicious document, likely distributed as a spearphishing attachment.

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 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.
  • 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://baarspo.ru/aws?utm_term=colorfy+apk+full+mod PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475570/normal_6004090130d5c.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/ehfoig1/magic_carpet_mini_golf_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/dxMgiih/90031106388.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/fjjiaja/98186139473.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/k2zjiyp/ombre_nails_pink_and_white_short.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/6iggear/84412063080.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370071/normal_6007b19803077.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/5dbc9f69ac5.pdfIn PDF document text
    • https://cdn.sqhk.co/fekesolip/vrNYWgd/apple_iphone_software_update_using_mobile_data.pdfIn PDF document text
    • https://losiweso.weebly.com/uploads/1/3/1/3/131380476/vifusoraterera.pdfIn PDF document text
    • https://cdn.sqhk.co/poxofufiko/jh2HuZJ/3918130081.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/al7jeig/joleparukuguma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fe40e9749ed5.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/he9gf4d/can_you_stream_fox_news_live_on_firestick.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/otTe7hd/buguzarojafedotosebotu.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/cTjfjfF/guitar_ringtone_old_song.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
    • https://s3.amazonaws.com/dazinibonofobi/dota_underlords_guide_to_win.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/48788668507.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8C 4728 bytes
SHA-256: be6e938bed11a4a87d854bdb785607bc9e22c4239d78b518c64439b2f761478f
font_01_sfnt_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 10744 bytes
SHA-256: 80d4b7501d7f1c4c2d1c11c98c438e24947ef2295244b13b64da33e5cd8c46f3
font_02_sfnt_off00011397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11397 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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