Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfffee18c6506a6…

MALICIOUS

PDF

75.1 KB Created: 2021-09-09 22:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b2dacb890ff3fb13174a713d1aefd0a7 SHA-1: 41722e9feaaa0b8abb19f4fc954a9924f78960c9 SHA-256: fdfffee18c6506a6d03e91ec94c9053afa7a2a72df4beb9e00e8405e0a50e6ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs that form a link farm, many pointing to compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the phishing and link farm attack pattern. No scripts were extracted, but the overall structure and URL distribution indicate a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://huntic.ru/uplcv?utm_term=download+game+ppsspp+naruto+ultimate+ninja+heroes+2 PDF link annotation
    • https://metrosecuritynepal.com/assets/userfiles/files/misulotasibemezevafa.pdfIn PDF document text
    • http://irodaszer.lukinserv.hu/file/99034692846.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/kexixodowawutugemudurimi.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/migafolenemixovu.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613821b3b0fec---27783414865.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/8767391341.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/4e5a8e2f37f2977ad0ff910c0328c5bc/buvevof.pdfIn PDF document text
    • http://wjcopy.com/upload/files/73774347179.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/161338dae1675d---4995949975.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/tamaxenexib.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/vowikuve.pdfIn PDF document text
    • http://ombs.ru/uploads/files/8777283207.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/dalebeluki.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/lijifubaj.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/mixebeturowu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613021f598dab---davogubekavodilinepi.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/jatij.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134245179d72---motigirewolavipifafomim.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/92029018344.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a4aac3573---79810534612.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/19030189627.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/pimatebupifetaw.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/sufinubimajulowuwopipu.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_off0000c129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC129 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 16744 bytes
SHA-256: c28d7f2e7cd7da56a662518ed52c1bb2456e42cf2360f988d9c4af15c55c5352
font_02_sfnt_off00010463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10463 11276 bytes
SHA-256: 391e59c540df3df7a17eaf2902a938be70452bba6887ba01d0e188c44dfc93d6

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