Malicious PDF — malware analysis report

Static analysis result for SHA-256 af82f94683bb027f…

MALICIOUS

PDF

113.2 KB Created: 2021-08-16 19:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 913fc46de8b6dcce4acf3f47bd4f8b98 SHA-1: 020faa27b46af1700398fdcc3055786f35f9b174 SHA-256: af82f94683bb027f65e314025f9af92f4e426ce53c1c20cd3c6ee612fa6936bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/89dd30379cc3683af8331bbb31838dc0/lakizaboviwopajem.pdf In PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/gixijelefu.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/0b22a66a4e397f0f916ec1eb10736294/worosug.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/zogakezopevivevus.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/wubedoxivufup.pdfIn PDF document text
    • http://atrsara.ir/resource/files/paxaketigig.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a7447720e---tiloduwodakazisat.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913ec2ed3d2---38157396343.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/94v4d9p9u16o6oifkrjj1sirts/23396146956.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/256c219d1acad803d1540b8111076770/dovobomufelanomos.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2651aa01ee---6791074640.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/26819604989.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/j4985bmndilpab21um3n3g140u/35466267693.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/22d43aaca1fc951fd2bb2b879367ff2d/ximotupifom.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/kijugudibobiga.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/tavurinaduxozagitenozaba.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/guwijibuxowepisowipotigur.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/vebevag.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a219658e98d---85247737145.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/64592621278.pdfIn PDF document text
    • http://armanetti.com/images/xukipafojukaz.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/mefasi.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/fje0pdjo5va3uq7f0jrpr73ks3/zovimatu.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607729a0d0b40---86764979461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=gods+of+egypt+full+movie+download+in+hindi+720p+filmyzillaPDF 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_off00015141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15141 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16953 18764 bytes
SHA-256: a77c6c49fd8cb1d046444a06452e806862259ee8650cf64594f786a69459c06c
font_02_sfnt_off00019ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AD6 11600 bytes
SHA-256: a76776ccfa3261cf752539d6655a1276bdf07e271346f2a94717ed2ca079b102

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