Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a26f8064c05140e…

MALICIOUS

PDF

77.6 KB Created: 2021-06-26 23:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3d82c8719e3bcc1239f8b5042f8c585 SHA-1: a624ba79140873c92975dd8a0f5bafb07d810ecf SHA-256: 9a26f8064c05140e4b1c0c49aa64980952788544e59d7d9b79562acd6f12d5df
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites hosting PDF files. The primary purpose seems to be redirecting users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088908e77482---86152573467.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/cf1a69aacdc010e39648a25a701f4222/livoneka.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/1rndmjk40jdjggj4u5e5t57e0i/zipewuzalaw.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/37acc07b7b1c604fad3497f9caa72e5d/82260216955.pdf
    • http://ahkjt.com/upfile/file/luloruvafa.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e5abbfce6---95087475119.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160739e1dedd96---sizodutox.pdf
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/70b8452bb048ebb0677b0e5d6e96ef21/31817725402.pdf
    • http://agcslohian.com/userfiles/file/11668750687.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099153ee661a---18862343212.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/fd864aae4f61cf859814008e2db5b018/18818482057.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857a7d2cdb6---fubiputeberejowijo.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087036036463---28866360058.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/gid61f39lo1kfqh88amproa1rq/gowafebadutipafufex.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/a45kv9gq0nj4td9n4unaagnk70/nevefoga.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/4c2019cdde0529c5781e60f37cc8ff2e/diritefarolozorujuxilav.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609edb581d082---gexatebiwagelafad.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a1902ad42---92885130617.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160745af843cd6---toriponi.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41e5f16ac0---firina.pdf
    • http://2440027.ru/upload/file/70810958081.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d3aadca6d---31821254010.pdf
    • https://childconcern.in/trila/userfiles/file/vezanerevegeburosow.pdf
    • https://unosms.us/userfiles/file/kigibofoguzo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=at+intervals+meaning
    • 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_off0000cadd.bin
904c4ff460735fee17ee0999d0a8437e905e2c9110576ecc5d760e980c9bd5d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCADD 17308 bytes
font_01_sfnt_off0000f801.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF801 16792 bytes
font_02_sfnt_off00011018.bin
4dfe4150c489dff7b5870533684eecdcdda8cfc90bd87418629f0b46c153f43f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11018 10380 bytes

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