Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0273f3fbf1ab202…

MALICIOUS

PDF

86.4 KB Created: 2021-06-26 22:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 520aeddfc71a5d48b6f9437c36e5c496 SHA-1: 354a62dd3d0cd64dc5c8ae7af6d71c30e48d988d SHA-256: d0273f3fbf1ab2020d12d62dc1dae2e82b83d1ac5397e6eeebe4b3b3d811231f
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. The document contains numerous links to external PDFs hosted on various websites, many of which appear to be compromised or disposable hosting. These links likely serve as a mechanism to deliver further malicious content or lead the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160948048e8725---xofamipafiwapiripokobazi.pdf
    • http://beveragesgs.com/userfiles/file/14300048103.pdf
    • https://hansenlight.com/UploadFile/files/11586879037.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/b5c3cfcacb21c33b04b8d677c7cd245f/49908143451.pdf
    • http://dansensvenner.dk/imagesfile///zukejakisamisuvexe.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/fad13c3966190653c559d1b0ab063f1b/nibililemufagewiroki.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/c8ar3dk79gfn949d0bqqedff80/gemon.pdf
    • https://implant-drill.com/userfiles/file/20566496648.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37ace947c8---vedoseruniziwasalamero.pdf
    • http://446888.top/userfiles/file/namubobe.pdf
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/f692e3eb007873ff51bbee5d732c96a0/lekigise.pdf
    • http://afghansolar.com/userfiles/file/54391052129.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/lrmjum6i0n2hkd4184crgodod0/bepabubemumanavu.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/1chqju507sp7hfpjrc3cuh9hnb/loxesidajafumodezag.pdf
    • https://geneticapanama.com/userfiles/file/jefuxijesusasumagu.pdf
    • http://cesurmakina.com/userfiles/file/xigenavupe.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f06e94b845---7576927583.pdf
    • https://scalper.ir/data/files/file/19185165359.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/19g9e8vtgt1q7s9n1glphp6rf7/44556326005.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=statement+of+the+problem+sample+questions
    • 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_off0000ee59.bin
3ccbccf7a146bf5095c527c6f8fff9710729083d41e7bdbefe78944510739ce1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE59 17080 bytes
font_01_sfnt_off00011af9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 16792 bytes
font_02_sfnt_off00013310.bin
c314b17ef817ff8da63b09e560a913b1a06ada99a6012663f07598db134eb43c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13310 11084 bytes