Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cae8eeeaf5b6587…

MALICIOUS

PDF

82.7 KB Created: 2021-03-24 21:16:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87dc198f0ce4cee1aa72d3745f0dec62 SHA-1: 842b6bcd30fbad13f86bf6010246cea2ac0162a3 SHA-256: 5cae8eeeaf5b658774594f03eb21c408ae4e281d57a33d1bdced71ff320e26c7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/wix?keyword=ccie+security+study+guide PDF link annotation
    • http://gulenapirexapo.iblogger.org/xatak.pdfIn PDF document text
    • http://pogofefopi.22web.org/47604698506.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/taxowubil_raxavofejupa_kedaretuzizisu.pdfIn PDF document text
    • http://rakukoke.22web.org/ximafutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_604d3fe464dfd.pdfIn PDF document text
    • https://gonibulurigudum.weebly.com/uploads/1/3/0/8/130874364/922069.pdfIn PDF document text
    • https://poxomovuru.weebly.com/uploads/1/3/1/3/131381772/xebuzageviju-gosajujego-gekuginuvuta.pdfIn PDF document text
    • https://wixevilit.weebly.com/uploads/1/3/4/8/134873569/selorilev_texevenosox_solomodulux_garadumu.pdfIn PDF document text
    • https://podinelejuwe.weebly.com/uploads/1/3/2/7/132710627/b142ca3.pdfIn PDF document text
    • https://kixaxadamakike.weebly.com/uploads/1/3/0/7/130775249/1de00380db232c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472495/normal_5fffb2d27d000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_60536c31dfcb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tapalif.epizy.com/lirefuxab.pdfIn PDF document text
    • http://sosurovupek.epizy.com/38029578755.pdfIn PDF document text
    • http://suwuwigo.rf.gd/glorious_day_casting_crowns_lyrics.pdfIn PDF document text
    • http://xowofalofuzuxis.epizy.com/97966005213.pdfIn PDF document text
    • http://nevozabewovezo.epizy.com/tewadajupar.pdfIn PDF document text
    • http://ronufabadexulab.epizy.com/mibujixukoropifuzizegaj.pdfIn PDF document text
    • http://safilizejodi.epizy.com/xaxajokilibaro.pdfIn PDF document text
    • http://fufabufitilaf.epizy.com/sharp_objects_trailer_2.pdfIn PDF document text
    • http://foboganezebalo.rf.gd/sad_alone_picture.pdfIn PDF document text
    • http://sovewegupafipiw.rf.gd/13209979041.pdfIn PDF document text
    • http://gamuxazibosiko.rf.gd/how_to_troubleshoot_submersible_pump.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_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 4872 bytes
SHA-256: 270e306eeb9b5953e6ec47cbbf593889c9cc907f23e60ef9020d519df8a192a6
font_01_sfnt_off0001147a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147A 12152 bytes
SHA-256: 5831b8c7d93861e80605ee4df2407f4474271076774e4c567dd1b922ef87bb0a

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