Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc116cb2502d2a56…

MALICIOUS

PDF

141.6 KB Created: 2022-05-30 00:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 56a7401f085754e6c459a4c276d0b770 SHA-1: 3c0fc401d5a632288a0eab9be3e82781dc8045b3 SHA-256: fc116cb2502d2a56af84974e2a6d239d7564fc7cedec367c57282668c43551a0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests malicious intent, likely to redirect users to malicious sites for malware distribution or phishing. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9869

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://lovig.co.za/XSRYdR1H?utm_term=usmle+rx+qbank+pdf+converter+online+converter+10 PDF link annotation
    • http://tzsunup.com/upload/53522540133.pdfIn PDF document text
    • http://celox-st.hr/sites/default/files/fck/file/lapemaxapopupa.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/52664654205.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/dadivigefokar.pdfIn PDF document text
    • https://ranumurubakek.weebly.com/uploads/1/3/5/3/135341533/a02351fd2e.pdfIn PDF document text
    • https://zowagupiwu.weebly.com/uploads/1/4/1/3/141333214/5912c47d02a.pdfIn PDF document text
    • https://nogutupevawas.weebly.com/uploads/1/4/1/7/141703256/kanolejutelejaduwim.pdfIn PDF document text
    • http://www.imcet.org.tr/kcfinder/upload/files/71325103860.pdfIn PDF document text
    • https://sincomerciariospv.com.br/kcfinder/upload/files/kobukefavorogekagekom.pdfIn PDF document text
    • https://verdadeon.com.br/kcfinder/upload/files/mejozalasodow.pdfIn PDF document text
    • http://tnet.site/kcfinder/upload/files/vebivefole.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/pokejigob.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/27684327831.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620168314d4c1---64501166217.pdfIn PDF document text
    • http://pasted-radio.de/web/files/bajivenalefigalibaliw.pdfIn PDF document text
    • http://philippetardieu.com/kcfinder/upload/files/dikogoramex.pdfIn PDF document text
    • https://unityofmyanmar.org/images/files/rojud.pdfIn PDF document text
    • http://dmpenterprises.org/app/webroot/img/uploadfile/files/24018250988.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/162651056266ba---54875777915.pdfIn PDF document text
    • https://tuzufivogov.weebly.com/uploads/1/3/7/5/137518576/jatejoreli_nesetozudut_noxata_xebewudiruxikej.pdfIn PDF document text
    • https://midefadi.weebly.com/uploads/1/4/1/3/141328859/890144.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/63683897508.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001e0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0E4 16744 bytes
SHA-256: 20bdd5020d1b8b24c166c5697ce0b784699b7ae73679e9eaf29b4a033f62e75f
font_02_sfnt_off00020c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C1C 11508 bytes
SHA-256: cbcfec419a72f47c15c290cc871eff5a30064f44a59971d56184544c8755c46e

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