Malicious PDF — malware analysis report

Static analysis result for SHA-256 937ff69fee0b1ba2…

MALICIOUS

PDF

82.8 KB Created: 2021-09-24 21:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 04f6db35220311ea71dff46b3b7d18e0 SHA-1: 106a2e344710714f06e7a13373a14a6fff1f8093 SHA-256: 937ff69fee0b1ba2ebc03984a1e96b361c3cecd2728e17056cc59ae94942f198
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards techniques used for initial access via malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=android+zaloha+celeho+systemu PDF link annotation
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/11225932175.pdfIn PDF document text
    • https://robindayne.com/ckfinder/userfiles/files/barutox.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613934be5c60b---67432082751.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/lasasiraxalis.pdfIn PDF document text
    • http://isvpro.com/custom/files/57932853165.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/86001493693.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/7976516421.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/pilonokolupuzijukomuxumu.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/70794847199.pdfIn PDF document text
    • http://splogservice.ru/content/files/doladegiwoz.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/fofomoder.pdfIn PDF document text
    • http://drdj.friend-match.com/upload/files/99202940809.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/43687527212.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/88877274149.pdfIn PDF document text
    • http://myslizdrave.com/soubory/tanezilufexavunak.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/nerufidelixoxidikebugofu.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/93980978274.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/lobavokudikujeloradanow.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/vakemobuluvateragok.pdfIn PDF document text
    • https://csodamalom.hu/files/files/66633577355.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16147b59a2042f---bawosadonow.pdfIn PDF document text
    • https://aayams.com/userfiles/file/13007940010.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/50078647126.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/fibaguripig.pdfIn PDF document text
    • http://att-na.com/upload/ritekomow.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_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 20744 bytes
SHA-256: f82e3bbd605b79d839c0dfbbac9f97f202e108ab9982191708697b026581c4e4
font_01_sfnt_off00010a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4B 10888 bytes
SHA-256: 91c0161ed4d7486a32c9beff615b5d427bffe26a904e39adf5dab8e652d3fd41
font_02_sfnt_off00012360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.