Malicious PDF — malware analysis report

Static analysis result for SHA-256 a196fb0c08ed1db9…

MALICIOUS

PDF

90.4 KB Created: 2021-09-07 13:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d2e1b1be0439e27312952a5728b7d86d SHA-1: e0267089a5e5bb7221a40955a587fe010cfb5839 SHA-256: a196fb0c08ed1db9b4fa7730bee8cafdd9acd7165d7f0eee69db0b7b9555ebad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' specifically highlights links to compromised WordPress upload storage, suggesting a potential distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://isabellepieman.com/userfiles/file/radev.pdf In PDF document text
    • https://tannhatviet.vn/upload/files/lanolijazupitob.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/96145964992.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/wijub.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/zididateguxina.pdfIn PDF document text
    • https://webmenuplus.com/images/file/pubuvurikubujilupumu.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/82445866843.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/90d053a5ce57b63e2ab2ae13dbe04944/gowugurifap.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/jodizulinurepipetiseg.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ba6fdc4d8---29673437030.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/27809957961.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/jivigapemedizikewul.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/kixalagigawapafeforodu.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1612ba8d8bc126---24795375050.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/guvaximubapenufejo.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/jimafurew.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/bizibijedimanavusoled.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/mi3v697ci1gtpreul3s6579sqg/dagadebesosefalezidasipep.pdfIn PDF document text
    • http://falconltd.pl/cache/file/bemeninatelakezirad.pdfIn PDF document text
    • http://hangquangauto.com/files/61479842732.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608212efd83a8---xenivepunesifofa.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b347a24bf---wakabuvevazetita.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=programma+per+modificare+pdf+gratis+italiano+macPDF 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_off0000f8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 10964 bytes
SHA-256: 3b0b80ad1adf10b161d8e0eb47163bea3811eacb4b80f7bde8f6e7e63d45a654
font_02_sfnt_off00012a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2E 18872 bytes
SHA-256: e90d20f5a4f57a55d7b4b26f3e7001274e00b579ccce127ce95a3738a1572e7f

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