Malicious PDF — malware analysis report

Static analysis result for SHA-256 08113b470d9a44fa…

MALICIOUS

PDF

77.3 KB Created: 2021-09-04 07:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 822b937521d1e29420fad94b823b2ff4 SHA-1: 270765c422d7d0b829c568195d4677e3ba5031a1 SHA-256: 08113b470d9a44faf6facd38b2d6b690ade467ac5ebe020a178ec6468f551920
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that exhibits characteristics of a callback phishing or tech-support scam. It contains numerous links to potentially compromised WordPress upload storage and disposable hosting, suggesting an attempt to host malicious content. The SE_CALLBACK_LURE heuristic indicates the document likely prompts the user to call a phone number, a common tactic in these scams. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160965fad5b558---muzivaku.pdf In PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/mofadexebovurasori.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/diwuvolenisagijuwif.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/2d8adb08344bf81c39bde3eb24acf870/jemenotijelokufu.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021061311472573499.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/makuragazukabusovosonod.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161175ce0deb17---74627170689.pdfIn PDF document text
    • http://cbstav.cz/file/sefeneninonanu.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/1bc0552f15abe32cae08a0dfe32ab72b/sigawixatarafujir.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/mugevepix.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/vameginesagotu.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160be7aa02997e---jodazok.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/eleninijakuxeti.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/gurugaxaviroxowizal.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/05bbab5d24321c35df3edfb10a160f3f/budanogekune.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zurajuko.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/66593687683.pdfIn PDF document text
    • https://hgb.se/filer/file/79630076042.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/gaduzosaf.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110a882e866d---zefevodalunamebajisun.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/vasukenamafuz.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1239cdee98---zonopuwug.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/15342947052.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/78204083054.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ilmtb97l1mtbv6pb5e7ktpldin/vejaluj.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3acc08b377---gojunifuzifog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=menschen+b1+pdf+downloadPDF 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_off0000c71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71A 18848 bytes
SHA-256: df05ec798247eff99474e31dd383de2264b7c59d03b5d31b8a31579691753921
font_01_sfnt_off0000f77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F92 10696 bytes
SHA-256: e9bf01617542a2f16a2a7f2ddb4c318f37cd2fb7b041d880b61058506bee8960

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