Malicious PDF — malware analysis report

Static analysis result for SHA-256 a918cafa7a9cfc21…

MALICIOUS

PDF

87.5 KB Created: 2021-08-29 19:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 233ee4b680cf5257ad6334e8aa6e9d3f SHA-1: f7a1534b4d1df6c2acd7eb0f0d8532d6b4d07c69 SHA-256: a918cafa7a9cfc212a5202673c59e6322b74dc6827b74646393b0ce1396e4836
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-severity PDF_RANDOM_URL_LINK and ML_NYX_PDF_MALICIOUS. It contains numerous links to external domains, many of which appear to be compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection further confirms its malicious nature. No scripts were extracted, but the primary attack vector appears to be directing users to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://skatrip.com/basefile/skatripcom/files/rigufusesoxalu.pdf In PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fb69d82bdc---9203639499.pdfIn PDF document text
    • http://skia22.ru/pic/file/43826672477.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b79ea48b0---xonat.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/95165038563.pdfIn PDF document text
    • http://propellerclubsandiego.org/uploads/files/31239477226.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/cc89823196f72766698b8729a53dfecb/81098179419.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/nalibosovovi.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/80562272073.pdfIn PDF document text
    • http://ietc-oman.com/userfiles/files/puzarugugunadinudud.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9954bd859---56849153913.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/kuwirudomowipaxorodol.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/96756961585.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/pasibosomiwuze.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd41b045c3---64850501505.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/pategiropada.pdfIn PDF document text
    • http://dentherapia.hu/files/file/semedebipido.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/68592335976.pdfIn PDF document text
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/69320654389.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/pipofipijurifetefak.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/4c18f772781bc611e5b8a18b68a57ea1/73542030124.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/24834899840.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/bebunipuno.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a35e141c68---memenoxasisakuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=whirlpool+jt+369+wh+manualPDF 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_off0000e6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 11032 bytes
SHA-256: cf55efe1cfd779efa4e68ef95c836db037ea9a0448a77708d8047e4a050b728a
font_02_sfnt_off0001184c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184C 21060 bytes
SHA-256: a22dadb16c139591e6f9d257ddee1c6bd302b30a4569e290d5ba166b24ced383

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