Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4bd29837d266205…

MALICIOUS

PDF

71.4 KB Created: 2021-09-20 14:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2ff9b66ddee9d0937abaed9aee80a117 SHA-1: 995ea144257a092e387895f2dcc3cdd128b0bc62 SHA-256: d4bd29837d2662059e5ad0d17cee07419884d7078dc623af3c9acdea767b55ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, likely to lure users into downloading malicious content or visiting phishing sites. The presence of external URIs and link farms suggests an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://catamma.ru/uplcv?utm_term=free+fire+apk+mod+unlimited+diamond+download PDF link annotation
    • http://www.motionmantra.com/userfiles/files/zudusodajabitet.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161380d7872c58---55751186672.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/p8ieq7b11a68oigvt3clnopdre/28751615814.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210910154303.pdfIn PDF document text
    • http://meditopthailand.com/file/13628630748.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/bonivuvad.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4f55a38a1---63815964564.pdfIn PDF document text
    • http://sdds.be/userfiles/file/31440915067.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-18/20210918015653131197.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/bijesafemepis.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/28742166762.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614542758ad16---lomotef.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/dimuzotibiwizovesijod.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/mijuxamugujajewul.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/59909577330.pdfIn PDF document text
    • http://bekescsaba.varosom.hu/userfiles/files/16361672618.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/vazaxuzubagepixuraxoma.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/vefitad.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/boxasezemibuwo.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/kaduvexofukonorapume.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/gibufalo.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/rirafipafulu.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210915_59392FC89E07B6D9.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/33966688030.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/60122327772.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/84007605126.pdfIn PDF document text
    • 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_off0000b6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6DF 10748 bytes
SHA-256: 167dfb444a62c31464e31d2b63c276938cbeb3fb35d652dcbe987c8c9ef2a122
font_01_sfnt_off0000cf87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF87 15848 bytes
SHA-256: 27abc0a87b9d80f6de1c0b9f4a533e2ab0d5e4aa2e588b638947042a0b8e499d
font_02_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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