Malicious PDF — malware analysis report

Static analysis result for SHA-256 3434a8f39219e785…

MALICIOUS

PDF

116.3 KB Created: 2021-07-07 04:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c59dd3b0bbc03d6c562fdbea71ca1fef SHA-1: de587ad0484d335038cd851f4cc1a91dfa5cc68a SHA-256: 3434a8f39219e785092e04f65597c8685a1458ec901b9af51202a26e1496f496
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, with at least one pointing to a compromised WordPress upload directory, suggesting it's part of a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics strongly suggest the PDF is designed to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=nhl+17+trophy+guide
    • http://lulanjina.net/upload/files/zumesufogefepex.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/25e8b5cbf155d445cbad610b9202d343/93616491788.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/4d84024a9379981f02d9a9a93c65b4f4/kiperegonideru.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608887ce10d51---47982137474.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/229fa5orqdfaani76c20plctbv/94361203376.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609be42875c95---jomegilagisakijomakuro.pdf
    • https://vieclamxaydung24h.com/upload/files/41648318133.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095dfac91f72---rumatovunefalilodomekobe.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d7d354fdb6c12cdad80dc155ee00ab7d/pifidexedobiwevipimen.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a00ceca77f6---rawijodabewame.pdf
    • http://karunb.com/UpLoads/files/safazoresil.pdf
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/masojusifefadifefi.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdfee7acc0---68014441804.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/vkhpjmvphbk7tf21e15532qci8/bikulugelolesin.pdf
    • http://studiopignotti.it/userfiles/files/91933068795.pdf
    • https://laurallo.com/ckfinder/userfiles/files/34956930120.pdf
    • https://dm288.rs/slicice/file/mediwosilibutog.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075e06ec2a8c---xirerobelatidasokeri.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/8d433bc7959146df9c36affb53b46828/remuwoxitopuvaju.pdf
    • http://caratow.eu/userfiles/file/gelinum.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/1612c0e7bbfb299a55da6642d5d88691/96016130366.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/95cvj2i580p4fl5m7nfliesa0q/kinufovararurek.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fa0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA0 16792 bytes
font_01_sfnt_off000147b2.bin
566e63a8b102bd81f88bd251d1936c6c9f9830154713a039a33ce2eb9f34c566
pdf-font-stream PDF embedded font (sfnt) at offset 0x147B2 20004 bytes
font_02_sfnt_off00017aeb.bin
f62a33a6eb392f8beed6bf480bb6afb1ce299defdc480246a3f18dcc9791f9d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x17AEB 10528 bytes
font_03_sfnt_off000192e1.bin
19fb3e0837d6f9ee728c5331d7bb33e1bff3d595bd4ca4a0aae7833d7d421d60
pdf-font-stream PDF embedded font (sfnt) at offset 0x192E1 16120 bytes
font_04_sfnt_off0001a832.bin
d2a6be2698a9814ff07f3b2811687b48f5222177ac6e1dc40d7c35bb4ce91360
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A832 7700 bytes