Malicious PDF — malware analysis report

Static analysis result for SHA-256 67216d2093574b95…

MALICIOUS

PDF

84.5 KB Created: 2021-09-12 03:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79edf7acaadb696a948b8b12805053a8 SHA-1: 58f2f57cc8f5a57e55b3c5311a521c566a1c5fa0 SHA-256: 67216d2093574b954844f157bad1fc2aeb3d732c9f3d1f9d92a375c7d93a80a8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://farmaciasacoor.com/site/upload/file/ditalafesolalimis.pdf
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/fofeporobax.pdf
    • http://tribo.kz/userfiles/File/94950792451.pdf
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woxegimibiwupejim.pdf
    • http://parikshitconstruction.com/uploads/kiwovadinos.pdf
    • http://westhollywood.ilovepokebar.com/uploads/files/xinofawaxutefeganegigi.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c69143fe0d---palolejukotevukes.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/2305688457e003cd8e6368493897f134/matubebowedanasen.pdf
    • http://buyyoutubelikes.com/ci/userfiles/files/wasovebosirajexexidexido.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/mogucfnc5g3pmjqg73dp505d00/83821858201.pdf
    • http://tienhasteel.com/app/webroot/upload/files/98453804644.pdf
    • http://esistore.de/userfiles/file/kawolatiguxuvunuzadup.pdf
    • https://mmgrowersg.com/ckfinder/userfiles/files/45065228815.pdf
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/mapirutulugofunebagubafes.pdf
    • https://www.assofmt.org/ckfinder/userfiles/files/bilasoxebogutojise.pdf
    • https://ropaalmayoreo.com/images/userfiles/file/mebogovevapadol.pdf
    • http://chelseafoodmart.com/uploads/files/wutemusisozavore.pdf
    • https://anglarill.net/userfiles/file/26832850057.pdf
    • http://tchid.net/userfiles/file/89038186163.pdf
    • http://www.europesolidaire.eu/userfiles/files/gozumujetusudov.pdf
    • http://dzirerealtors.com/uploads/4931114700.pdf
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/44352855124.pdf
    • http://emaaravm.net/upload/files/10263343029.pdf
    • http://hanabi-la.com/uploads/files/51760056184.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/rft9irndi8mqvgrecu4e0gtjl3/kajowofokipifoboxoxetajep.pdf
    • http://spadhotel.com/basefile/spadhotelcom/files/gasurejivinemunixidu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=free+gems+episode+2021
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5bd.bin
e03b8c800a6b0d6b348661f813305ab4aeaf94db2777accd3a8c244d8e8a5c4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 10596 bytes
font_01_sfnt_off0000fdb6.bin
ca15cb6cfcaf2b8f7a42130cfed0347d701541af4ef9a96e41da1e82f4940ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 17952 bytes
font_02_sfnt_off00012c08.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C08 16792 bytes