Malicious PDF — malware analysis report

Static analysis result for SHA-256 a617a297394c3d61…

MALICIOUS

PDF

92.5 KB Created: 2021-08-02 02:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9dba72e73ba6bce84ae61e090e3894b2 SHA-1: 1a32e3dfdbfaa2f26ca58bd113bcf40b7e775e9d SHA-256: a617a297394c3d6154a3696f7caec7cf405b45665d991079ddefaef2fcbfa300
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a "download button" heuristic, combined with numerous links to potentially compromised or disposable hosting sites, suggests a phishing or malware distribution scheme. The embedded JavaScript and external URIs further support the attack pattern of luring users to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://viral-list-monster.com/ckfinder/userfiles/publics/files/32501242323.pdf In PDF document text
    • http://www.elstar.ru/uploads/files/1646974736.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/kimobavokiguvet.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/k36umn9c2koqui6pc9h588sc7k/fabadututidaf.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a58758cd38---53439201375.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/31567413496.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hkq4rkm2up256tth4hno2ku7p3/50661179257.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16071eff757049---18986937993.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88b2cd87e---kafobe.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/14590313785.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aba6d423de7---13689155134.pdfIn PDF document text
    • https://migger.dk/userimages/file/75701685054.pdfIn PDF document text
    • https://kimansion.com/uploads/file/duluvotifivep.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/5hu3edrrc0o5ft9bic7j4f174f/pitujetesewalakelexajig.pdfIn PDF document text
    • https://khanikango.in/file/wujenotexojinafag.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/nazademupez.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609018e991c72---molarugejobuzoxedela.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/ctrctaeiatd2qfgeh22c3fu783/96056889834.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/91427130334.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/jiduwusevexizivuvonul.pdfIn PDF document text
    • http://enerkonelektrik.com/ckfinder/userfiles/files/kelexazape.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/78800004897.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/lorobavudamufipemurukalo.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beebbc5dacf---lekagezawagivifozaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=sus1501+assignment+2+answersPDF 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_off0000ff5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5E 10976 bytes
SHA-256: 44fa84b586514fdc615f347a9228fcf10d682b363bccbad102ca00882f060d0f
font_01_sfnt_off0001190b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001311d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311D 19144 bytes
SHA-256: 94e971d5ec76050e365b9ed00abd29cff5651664834ab30c659c1476692903d4

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