Malicious PDF — malware analysis report

Static analysis result for SHA-256 346859802f01f0c8…

MALICIOUS

PDF

93.3 KB Created: 2021-06-26 09:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fbb2de39dccd4d42f8791f2616142599 SHA-1: 02dea9f263b2c2bda024da3a928a8fc5ea9b0a01 SHA-256: 346859802f01f0c8df2fb54686426e5a2c57b7adf932f53c58cf534cd60ce9e9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/f9b7bdd87d92610b3cb85c74b8f5adbc/tofozaneburitupugifabumuk.pdf In PDF document text
    • https://acrgroup.nl/userfiles/file/25685189665.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe4b74c5c0---84243465641.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa7ea98ba6---fovibapugusuzojofe.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/4grhsv0c0rojftdf3j9i6ftdni/59727275939.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/gosodepikirosekevifunu.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c63c9c95559---10904285713.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ee9363b43---31479605404.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/28760964245.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729bec0e669---26737016737.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/3408e5f6403952f4db1d7ae8378ff6d4/tegudovirugotaxusinepu.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93bd36ae64---94442718831.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/bivifaweburiwuwurotagago.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbdb3722de---51921584955.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/883a12b6e4758cfd375949ad4716e846/xulaxedapefojuvazagotu.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/fuxekoraligegijorajef.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5rcb9cdcq72k10t1ifo9pbq6q/dujezebasakegiduduwusa.pdfIn PDF document text
    • https://vieclamhanoi247.com/upload/files/67341836871.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a580b9b620d---35438908266.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/vekilomafom.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/uecr53dt23co4huohbpi6rth9f/fivepiwibivevipe.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/jolumijogemipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=meaning+of+unconscious+biasPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12411 16960 bytes
SHA-256: 32f06ac292c99e2c6c703a1169308c229ea2143561c8c235dff122c923971765
font_02_sfnt_off0001500e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1500E 10500 bytes
SHA-256: 2016388f66befb92dbb82e98397b47bf550ea115aa58e5c7e2cf047b1d2cdbc3