Malicious PDF — malware analysis report

Static analysis result for SHA-256 b725d87287668cbb…

MALICIOUS

PDF

100.7 KB Created: 2021-06-29 13:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a254515ff3e9c65cd96ec6423ad61153 SHA-1: 03ce3fe8eced8c3db981914781411ace666edaf1 SHA-256: b725d87287668cbbb9be1ffb0b77bea5b1a674ae5d38beb9753691e1b16e028c
196 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable hosting sites, many of which are compromised WordPress uploads, indicating a link farm designed for SEO manipulation or phishing. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is intended to deceive users into paying fees for non-existent prizes or parcels. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://abc-tel.ru/data/File/49891263846.pdf
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/voalm7887i4r0a0tumb0s9bvj2/27058141980.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/60449090181.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/pbobsiit8ogsqr4ba0ve4g45o1/seridizila.pdf
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/9766153768.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a51cf085dfee369f751be02ec7c0f1ac/tuguvalupokus.pdf
    • http://tara77.com/clients/46590/File/futudofajobunorapuk.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/007785e0e1d444201f586feff1da956d/69210524495.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609832ec9b95c---24139865092.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdfb2a7e1e---bamisopudunubigoxuwakew.pdf
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/86711012940.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/903a16da1d8a80d630e8740613487beb/42269942005.pdf
    • https://podereilmontaleo.it/writable/public/userfiles/file/90869818607.pdf
    • http://dnepropress.net/files/file/dinixaxukuditugi.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/7or42cn1ccntur7r23anqg7apf/95699992381.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/4c8e04e6ca035e4895b9c0ba7bc61e11/39090574998.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16098b1dbc25f1---93685197532.pdf
    • http://billsky.ee/files/file/92414462907.pdf
    • https://flyags.com/editorResources/file///23007685232.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096a4dad23dd---41218772586.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d93b54890d786dbd1b99eb88ad525141/pubagixanifalekanufebuxim.pdf
    • http://juentai.com/userfiles/files/doxesinowixibovo.pdf
    • http://laclonghotel.vn/upload/files/47103373433.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=1+harry+potter+and+the+philosopher%27s+stone
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106DF 16792 bytes
font_01_sfnt_off00011ef1.bin
58d8a4eb7146510d424accdc0dcac79f11ed7df7725975c1db3e753aeed0b04f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF1 19384 bytes
font_02_sfnt_off00015114.bin
501e8124a0531580810f51ae075c54b3ea8069e2ece46c696b895a67a78af464
pdf-font-stream PDF embedded font (sfnt) at offset 0x15114 10592 bytes
font_03_sfnt_off00016941.bin
53f5adaeeea4a4940ff078b8eca9ce34dbe315933fcfaf7cc9424ff9082d30fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x16941 17772 bytes