Malicious PDF — malware analysis report

Static analysis result for SHA-256 0340c66099477a17…

MALICIOUS

PDF

95.4 KB Created: 2021-07-01 13:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de0ff5e6ba006bb35308767918f9c3f1 SHA-1: e08680bf90d77c9acb78aa85ed780859bb00e6d8 SHA-256: 0340c66099477a17cdf818e3cdfca3f224f9e771a8f65bf0f9a3bf4818f00e71
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content or phish for information. No scripts were extracted from this sample, but the overall structure and heuristic firings strongly indicate a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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.
  • 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 http://sosnovgeo.ru/userfiles/file/99420021418.pdf
    • https://kurtoglumob.com/upload/file/43635180921.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/c39c79b9e60e5729ce034efcbfabaca3/riduxaxeforoxigoxiberix.pdf
    • http://year-c.com/upload_fck/file/2021-6-5/20210605032553763164.pdf
    • http://hzzxtl.com/UploadFile/file/20210617041128003.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ds6p53brlv9i10kv2h12d63jt4/lolilupedosa.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160adcb238551b---93110935250.pdf
    • http://peaceinsrilanka.lk/userfiles/file/kakidokudolixivevituv.pdf
    • https://cakesandcupcakes.net/userfiles/files/zesexoguvokagigutugunif.pdf
    • https://feng-shuiworld.com/userfiles/file/kavegaraseb.pdf
    • http://sushikyototogo.com/uploads/files/20682927572.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/tqo4nfjts30m2257loriqds4p3/20051960658.pdf
    • http://jfe.hk/userfiles/sadevomo.pdf
    • http://maremio.ru/admin/ckfinder/userfiles/files/wesisemigosatikipafiki.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acbf39a277f---rurorisufux.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a4ec4cfe7---58971725437.pdf
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/bijewukavo.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/fvlkupm020n63jng2gn37u4lfm/53255723042.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/fqd8htvbolumb8ucdl4pmthc2t/41654580245.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8cb41cbeabd6034f6a12b7a30a2f5a9f/81033180842.pdf
    • http://krevue.cz/UserFiles/File/62959745627.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=inverse+selection+in+photoshop
    • 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_off000112de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112DE 16792 bytes
font_01_sfnt_off00012af0.bin
d462d6d31e321a38d8f58ef76ad1383b06365de6b5c79be7b54af58b7c5f0119
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF0 17520 bytes
font_02_sfnt_off000158f5.bin
a4e7346ac4e62f38730f63831278c28bc83adaa96e9e4c8a1533367b45369d23
pdf-font-stream PDF embedded font (sfnt) at offset 0x158F5 10324 bytes