Malicious PDF — malware analysis report

Static analysis result for SHA-256 b477279ddce65b1e…

MALICIOUS

PDF

105.8 KB Created: 2021-07-05 07:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c6022f7ecc856e487166e1e725480d41 SHA-1: 7029979405dc9333d7bce047e39181d23ce64b86 SHA-256: b477279ddce65b1e1c7ed902cdd22d5153f7d429aa6044abbafe503b81b78d41
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised websites and disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://akkoryazilim.com/userfiles/file/benarorap.pdf In PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27be77e551---48826518128.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/4599965301.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2287d3e03a54b746ed4bde4ee9216b6a/waxojakot.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de3a9a32194---21286616764.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/77028424048.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a0869c746c6241f77e2de3f0d77d84bc/sapozudawuwaropofade.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/91525202260.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91c1610d9---41935056408.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052407173773.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/givuguf.pdfIn PDF document text
    • https://wavemed.it/wp-content/plugins/super-forms/uploads/php/files/447d03ac7a5e75b7d682511a1395afcd/pedopagutavegigenefumo.pdfIn PDF document text
    • http://kbchina.de/upload/67197815942.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/kawipidagasitedadalibiv.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/tot3mm9ism5kl7ggmja9vrt9g0/538949991.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/perij.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/edf0ec6fb204a1b445e1f01566e0cd4a/nogadopuduv.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086613abe165---dadegonedegat.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607263174ad1a---misevoto.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/98e871e04788d547b1ddcdf5ae0fb8dc/zafepakexifik.pdfIn PDF document text
    • https://promise-land.com/upload/file/82383393506.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/4c3f5998af71465a4c8da81e4b33d14c/56057894803.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ocbq2eah049mkc78kv8k0rq44q/numurubufonagij.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/55779389442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=avery+rust+valleyPDF 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_off00013d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15561 17184 bytes
SHA-256: c4694c5c1923f16711752d6e21fdd5fd3b124fc84603bd149ef522d69667a304
font_02_sfnt_off00018228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18228 10048 bytes
SHA-256: 191b61e13ec636b814fb72beaf1935fdaf6610176e7006186206ce753b9095db

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