Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c496386b480112b…

MALICIOUS

PDF

70.3 KB Created: 2021-09-28 23:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e471e6e77db53fb613f49548ad99d72c SHA-1: 0ebfbbbac586b0f9c62da3eee48f9b88b952f9cd SHA-256: 8c496386b480112b34c4fd23b556ac68d0e06b2534ed76bb6a4ec4198da83943
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. While no scripts were directly extracted, the structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://jagamimpi.com/contents/files/fidekakuzebagito.pdf In PDF document text
    • http://traslochimontalto.it/userfiles/files/banisumetogegomujevefak.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/2310893862.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/69459863529.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/3732980883.pdfIn PDF document text
    • https://photopoligrafic.ru/ckfinder/userfiles/files/jefapi.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/kadumunexozimawuweradiz.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/86753152317.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/totexesatafumuke.pdfIn PDF document text
    • http://egitara.com/upfiles/files/jabosotakoxafelofakom.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614920a8d49fd---xigewogebosawebinezuxosur.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/75066543189.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/jekowobavanixuletixow.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/najitisaw.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/70854282493.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/15145276098.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/75306612661.pdfIn PDF document text
    • http://moscowcharm.com/content/xuploadimages/file/bobeke.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/kiritimof.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021918159138251.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136e84f03cfe---46953248365.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/30950444479.pdfIn PDF document text
    • https://businesslife.com/content/files/waginax.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/29ee1b5dc9380f550c4a498b931af9f9/vuxerukonisu.pdfIn PDF document text
    • http://tdbm.vn/upload/files/6952340669.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1614e81338d4a2---38100198050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=download+minecraft+pc+for+androidPDF 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_off0000b22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB22B 15972 bytes
SHA-256: eec18425b3919e5d03c6d5c40716799bfafd88e3d13f3ad0eb1ec237da1cd13c
font_01_sfnt_off0000dae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE5 10700 bytes
SHA-256: e63998eea9c705ab65d07d124cf089f1a0480a781c26ff38fabbf0269313e4b4
font_02_sfnt_off0000f369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1