Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d810e0a4e7ea215…

MALICIOUS

PDF

106.9 KB Created: 2021-07-15 11:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f4adffc918bb24247ede4f525dc8345 SHA-1: e47422359db7ab9d65ba3ce776a702f661585a96 SHA-256: 3d810e0a4e7ea2157f58ea4bb84a4abbff3859c7feb831f7aadcfaf483f061f9
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm used for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and embedded URLs point towards an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160996b24d6ed7---3453719256.pdf
    • http://royalgoodviewresort.com/Uploads/file/petadulemilagumevali.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/8764a9c706fc21cd88c258a6848ff88e/33786804736.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8da188d480---33762871978.pdf
    • http://banglenhospital.com/UserFiles/File/72721572472.pdf
    • https://proxus.nl/file/xozebikuvaxexu.pdf
    • http://lovec.bg/root/ckfinder/userfiles/files/15494404372.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec6a5ed7fc---14345355874.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/kagufowowimuzuvarivun.pdf
    • https://arbormaster.net/uploads/files/19788169163.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7507e4322---faxibemunamejuvopab.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/f28821f5a1b6473e7ba2bc815750a4d6/pikalodokilen.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b3bc323646b1bdcf41bf7642c1b1a4d1/90167671072.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/3cfdec97539af34c65ca5ec479377730/17957911279.pdf
    • http://kasystemofkarate.com/clients/861259/File/satimabijolokaxuwuxu.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607034f3d5309---zufuwetowujemu.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ma6ke73mnd9ihrr0hf3jkegit5/59391107796.pdf
    • https://lawina-radom.pl/files/file/zasarupifijukimitur.pdf
    • http://millecolori.it/images/file/vewugedegowamuz.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/39b484465111b5fa12304c1c6c5b61da/3680427193.pdf
    • https://kisikana.hr/userfiles/file/72047618695.pdf
    • http://lhjmfamily.com/clients/5/5d/5d8645f74963a96e1aea25f3b610eff6/File/15858930611.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b63e6f54cec---84959630825.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ready+or+not+full+movie+123movies
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cd2.bin
596cd2072ec6fd0286caeab48e50bce1e0093d116131830d76988e70639319fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD2 11184 bytes
font_01_sfnt_off0001571d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1571D 16792 bytes
font_02_sfnt_off00016f2f.bin
e31dc422d110b763c212f8d53916e459f2f5195e23ad175f95ba509ea937f9bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F2F 18552 bytes