Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82027f64fc25da1…

MALICIOUS

PDF

104.7 KB Created: 2021-08-31 16:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8472b703039bb19db4d14ecd226a3651 SHA-1: 6809a68745cab7bcbc0d302174548ff993d8e858 SHA-256: c82027f64fc25da13088f38fe158110dc9ace6285fce9e8ddfb4b3b12e86b883
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites, likely intended to lure users into downloading further malicious content or visiting phishing pages. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/af5cc8416e1f7c79dbf0b5040ee4a60e/gabodumunugaperomitevaz.pdf In PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b24f065092a---26468153641.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077654a60992---66076631396.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/coihtmaeb9m7n2adhhqv8mqgbd/97989502589.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9c3c5827---79107910382.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607048234c5c8---zosezevavulewobefemo.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612c43c3dc5a0---30285144825.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf17d00e368---14453639478.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/2d1113a24538963be2687c02b9d5bb1e/25442408241.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210824002756_szbrlv.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f24b13138---51773587557.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/jinifugis.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/8cuencgkhk8b8fnqi7167dhv24/dokukodolojomusip.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///pilizamusomenotusepalada.pdfIn PDF document text
    • https://morabia.fi/images/file/kudujajufakibu.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e3d060ef4---94384290853.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/xumutotamobavorejonine.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/larotukowaxumo.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/bf8079134da83bb7f2194ad503fc3140/90345234912.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/tazofovajutejulomerogapif.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/45393205194.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160915f2da02c6---17453378110.pdfIn PDF document text
    • http://ailizia.com/userfiles/razojutezezetixedukuvinor.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/rotenakuwidaxu.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/6901056498.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=lord+montague+character+traitsPDF 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_off00013289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13289 18604 bytes
SHA-256: 6f4291ae4f7ab9caf5f189d0fcf58ac01c76ba72942ee2799f1afafdbd7553fc
font_01_sfnt_off0001631a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1631A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B31 10828 bytes
SHA-256: a588c429cf0bd3f80633973f3fb12498c4eb3b030e80c8a6cb76b4908ca201e7

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