Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a10b578480d332b…

MALICIOUS

PDF

271.6 KB Created: 2021-07-06 06:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 04b5a5ec4c28fc693b322cfd812981f4 SHA-1: 5ccd97ff30ab71285da90c42cafcf5383216a9b0 SHA-256: 2a10b578480d332bf70d82fe7401ac5ce6aeabd15a3154d7c7880277dd87b816
166 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on compromised WordPress sites, suggesting a lure to download further malicious content. The primary attack pattern involves tricking users with promises of prizes or deliveries to encourage the download of malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://xinyuemu.net/assets/202106/files/20210630173328169554.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd1e3832f4---43915766158.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/52318350974.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e332a517b51---kuwokomuzuvi.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e07b2b8d56---48487908552.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b3f569e82---lelozupesuzul.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb5e09d81b---59692009331.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/55748797114.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ed6ef0f16---nogatukak.pdfIn PDF document text
    • http://zerosquareonline.com/file/47936492830.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/42441440096.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/83659837339.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/32653896954.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a3ef1e45dcb01c46f18d0dccf0b26b63/patubaxubetumubu.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737887845fe---71908172443.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/38022183274.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c118b104baa---buxibikijumanabum.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/65891417651.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/zodudujep.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2163be41c---dupitetaxaxa.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc23005ac5---xajonowula.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160901b815c2b2---lirusiw.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75403e73b3---43735324741.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2857d2ded---98179283832.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/latasuvoguruj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+fifth+of+marchPDF 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_off0003ccfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CCFC 20100 bytes
SHA-256: 7beca032b3d17b302199e0a79e322822a69ca789991d92d0ee02b04c30b40712
font_01_sfnt_off000401e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x401E1 10244 bytes
SHA-256: 81c6b74f37b11713cbac68c5cecb1256acf699ac293b160c44e3583120556bc2
font_02_sfnt_off000418f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x418F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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