Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5179b739c88917a…

MALICIOUS

PDF

68.7 KB Created: 2021-09-25 22:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fed7d01be26f1bf4f81723ee43966626 SHA-1: f47c046e9e466c5cf162dc2d8eaab6edf4a16470 SHA-256: d5179b739c88917a492f45f532efc48e1fbb70b32eb7a8f612b00239c6b1d494
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm for potentially pirated software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to distribute malware via the linked sites. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://fzcce.com/aimgs/uload/files/45012817471.pdf In PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/19489417344.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210923_CAB6A0480F5B1629.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/zubivu.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/8455886602.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/gozezotokuwejemopal.pdfIn PDF document text
    • http://kmsenior.org/file/files/muxisizunika.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/sijevokokelesumovilod.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/70394606972.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///tivetiripesuvorodorabawe.pdfIn PDF document text
    • http://kleiberit.ru/files/file/61962206332.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/79394141984.pdfIn PDF document text
    • http://fxlcd.com/upload/file/sujifer.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/gibatavatego.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/51849417980.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/65662828844.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/misebe.pdfIn PDF document text
    • http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/96817654344.pdfIn PDF document text
    • https://www.tristar-technology.com/ckfinder/userfiles/files/zivurujurupopi.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/6215537030.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=assassin%27s+creed+pirates+hack+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA51 10552 bytes
SHA-256: 49fc11025c2173fa76bfb826a19915b6f731a4acba88aa82a0290491c62fcd71
font_01_sfnt_off0000c25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25E 16900 bytes
SHA-256: 9beb4566b85e33f342150bd8329374f96cd58e45396f6c3c65773df05a059f21
font_02_sfnt_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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