Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f2f43b6b414d87…

MALICIOUS

PDF

79.3 KB Created: 2021-09-23 14:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 19b312bb6931950000efa8a79ff113a9 SHA-1: e4bb2e2031f589d880aca3aa08b5d01e4650e99d SHA-256: d2f2f43b6b414d876c26a53110f721a6af6fd152590798e0b727cf73bb6fd258
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and a URI pointing to a raw IP address further supports this, as these are common tactics for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.afurg.com.br/assets/ckfinder/userfiles/files/73623491591.pdf In PDF document text
    • https://angkalaris.com/contents/files/rotumugixaragok.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613026ba1aec6---39288459133.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/biwis.pdfIn PDF document text
    • http://soupworld.de/upload/file/68666095876.pdfIn PDF document text
    • https://revive.fashion/upload/files/fuxigo.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/35540734566.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/2551f708c150f8d144f423f2071b88e8/306426302.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/97757605025.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/2973736026.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/jaretirokiwisusapas.pdfPDF link annotation
    • http://urgentcarepb.com/userfiles/file/54630586101.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/wimano.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/texifefisanasizud.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/suvijivitigawepas.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/24458927832.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/fomiwafimakajada.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/32467300773.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/mimozogilik.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/lezopajixekafitokesoledo.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/dezokufarosar.pdfIn PDF document text
    • https://cecprint.com/images/file/76535773180.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/2814331499.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/30808137642.pdfIn PDF document text
    • http://afslab.asia/upload/files/nuvanamotesubol.pdfIn PDF document text
    • https://podimercrm.com/img/files/76016627128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=final+fantasy+viii+android+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_off0000d595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 16144 bytes
SHA-256: 0d0d5af246bc298740c2dec2618f7256d7b35ba1ce273c1e630aa4b7922eb51a
font_01_sfnt_off0000feee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11705 10608 bytes
SHA-256: 70b584884927c110743ded41f4ded0037e3dc3bf915b26fb21204c428ee5e7b7