Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04d9ec62191eac6…

MALICIOUS

PDF

86.7 KB Created: 2021-06-29 23:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 476fe82eaf0bf692144306bd591c3492 SHA-1: 06c5dff405a2718e5eeebca7f9d32f006281faee SHA-256: f04d9ec62191eac6b2af2c03532a17a27e533149a16a034ba54cecede4ce557d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple URLs hosted on compromised WordPress upload directories, likely for phishing or malware distribution. The presence of numerous distinct hosts and the use of 'utm_term' parameters suggest an attempt to manipulate search engine rankings or track campaign effectiveness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fc714c7c5---tatuzikisomujozivuza.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/95da57jtkfihn7fhs5v1k1hsge/13416234669.pdf
    • http://extintoresorigen.com/images/editor/51486149181.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16096cb2974556---geripaxubegoses.pdf
    • http://alliance-ltd.com/userfiles/nifudiduvonuwewakuvibab.pdf
    • http://high-keenltd.com/userfiles/file/popegoxasemokuwamokovu.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d2b3727909937346c1a5521c5826b5a3/1812312824.pdf
    • http://klusjesindex.nl/images/uploads/nowobonoz.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/12e8a1ec06db20e21ea54a7f31ac2438/fukedobanekadebexanoj.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609157ebc2986.pdf
    • http://qlinairnv.be/userfiles/file/13780913028.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/f16001a3105db4a2be63292eab489122/41340847636.pdf
    • http://childconnect.com/swi/fckfiles//file/fiwowubevidevikureni.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e6097e313---fobufizovukujaxem.pdf
    • http://ahlhy.com/uploads/file/281226535583.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/m660d94q6cs1odb4t6tt6ben5u/voxetipisusasozuwoboro.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/j9tivr2dsmn05huj5fhenps71a/denuwiluwojuvutene.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbefcf69b98---46568646390.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/8d745d4ccf459e187481d3699625c94e/30875651141.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de3357035f---wutunulizelejisaxe.pdf
    • https://www.passion-rnd.com/upfile/files/2021/06/23/dezumefobataforese.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+affair+at+the+victory+ball
    • 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_off0000f02c.bin
31bec134736984e82c70beea4f006e509a6eb6bb0072e798d866f75d15720f71
pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 10444 bytes
font_01_sfnt_off0001080d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1080D 16792 bytes
font_02_sfnt_off0001201f.bin
acdeb10c21b95f474176294550330d00930b4885769af0a456cdb2b5d9a3b18d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1201F 17508 bytes