Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd087be9491251df…

MALICIOUS

PDF

79.1 KB Created: 2021-04-01 18:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5b27519810705cac124c527f3ffcb5fc SHA-1: ee4d94db839b7cce6ec75c3195a34099085d553e SHA-256: cd087be9491251dfd554024cd04fa5ffbaa1f720e57e61040ff4d0bd5f26b3f2
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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.
  • 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://vilenefex.ru/strik?utm_term=how+to+get+tinder+gold+discount PDF link annotation
    • https://cdn.sqhk.co/rosojolude/jghhcif/95311460856.pdfIn PDF document text
    • https://cdn.sqhk.co/lowilufape/jjciLii/vesoribimovobarasajoga.pdfIn PDF document text
    • https://lapedifulijep.weebly.com/uploads/1/3/0/7/130739603/9875300.pdfIn PDF document text
    • https://ramoxibe.weebly.com/uploads/1/3/1/6/131636726/1611074.pdfIn PDF document text
    • https://xufudigu.weebly.com/uploads/1/3/4/5/134515134/3679335.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/4TYheS0/sevazov.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/Dqficbw/free_furious_fast_go_launcher_themes.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/Ngihchb/23053639468.pdfIn PDF document text
    • https://butegipabozu.weebly.com/uploads/1/3/4/2/134235803/9383613.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/hhAJphc/98179324181.pdfIn PDF document text
    • https://wajizewikibi.weebly.com/uploads/1/3/5/3/135326478/61abde.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/hjhhfjf/9314220148.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juninowixa.epizy.com/cinta_luar_biasa_lirik_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/44984971921.pdfIn PDF document text
    • http://niworojuxine.rf.gd/event_agenda_template_ppt.pdfIn PDF document text
    • http://vufigenetusanu.epizy.com/27492237627.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/17550447698.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/babanajogonizowozobewuvi.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_off0000ec78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC78 4948 bytes
SHA-256: e73f74b751a6598306642d868d86bebee62a27fe37aece003e5fa1667bb8901e
font_01_sfnt_off0000fd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6B 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 12096 bytes
SHA-256: e4c32e5ea9da719d3d22b13b78cecf1848725ee12698b18e2a5f7d54f4f2a00a

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