Malicious PDF — malware analysis report

Static analysis result for SHA-256 434189d7ab035014…

MALICIOUS

PDF

90.3 KB Created: 2021-07-01 01:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7b9addabb83735c91aad2107a4acd74 SHA-1: 9289a8a72c92e96f0f4388277b9cd66d2d038eae SHA-256: 434189d7ab035014265111a1eb73f6e9abe26ae7774af5a35b6eb1300e9ec647
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://ketchas.ru/uplcv?utm_term=national+security+strategy+2017+pdf
    • http://insidethedigitaltrend.biz/userfiles/file/7875367860.pdf
    • http://amdind.com/userfiles/file/sizelikagitufobazozap.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e77ca59a4f---73882386244.pdf
    • http://gianniarnaudo.com/userfiles/files/27049650867.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/227576cddf5b0952e58ec2c30ff6b979/pamosokij.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0754457158---23829536599.pdf
    • https://curewelldiabetes.com/userfiles/file/18618322244.pdf
    • http://www.alcera.ca/userfiles/file/maziwometez.pdf
    • https://miaousland.fr/ckfinder/userfiles/files/13924292927.pdf
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/kaxodijozog.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/r234947s7h0183dlombq2dinj2/dixinumurupe.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921fb944576---padavojafowodo.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/99fce724037ef73ced0125f313f9a5b3/18204743326.pdf
    • https://paperland.bg/uploads/file/peganovel.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/90e1vbbaj1htb9a4sgunfpsfj2/zozizurulapimuwigofinavoz.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160afaa4d01a03---gepokivijasusemilofuk.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/9a8a6b7e5d260f813bf747fea9dda9d8/rezezibu.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de65dc9e60---foleruf.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cb551674a90---39447093214.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b866ab6d122---vuzobikex.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e4a98e47e---51750327863.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/066efd9440015c9af32d95215f7be01a/56295674089.pdf
    • http://gursakaryahukuk.com/images/file/20236613801.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16079212f7f0c0---zotatine.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd01b37284e---damanixeduxumebigo.pdf
    • http://ateliergermain.net/sites/default/files/file/63630075325.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/9d9816b559b2b4c413f8b661e6ad7e11/72678077765.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc7a.bin
e3a0572403027f9d9402248239bbb5705917bad0bbd7167e7eca019d44389574		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7A 11328 bytes
font_01_sfnt_off0001173b.bin
ee110ad35d640f5dec55e76094341ec7cfbed697db890984564ce2aac7f08663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1173B 17056 bytes
font_02_sfnt_off00014343.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14343 16792 bytes

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