Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f681688dec51a9f…

MALICIOUS

PDF

86.0 KB Created: 2021-09-16 14:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cdd3fc19c6576f280d55c069fbd3527a SHA-1: 91858dfea42d65bc677778a5965d5fdbb419483a SHA-256: 7f681688dec51a9f91596b08bb61999188182b7d3f89ff6fd7fd39e55324facc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document is identified as a malicious advance-fee scam. It contains language related to lotteries, prizes, and parcel delivery requirements, aiming to trick the user into paying fees. The document also hosts numerous links, many pointing to compromised WordPress upload directories or disposable hosting, likely serving as a link farm to further distribute the scam or related malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ngor2-3.com/file_media/file_image/file/sivur.pdf
    • https://bnbcostaverde.it/userfiles/file/20073141101.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161409030e4c3f---rinogamoxokagag.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139d364c4f67---20275910227.pdf
    • http://bishnutoursandtravels.in/userfiles/file/13438432169.pdf
    • https://uslugiinzynierskie.com/eurostyl/photos/file/25292911600.pdf
    • https://piauiaqui.com/ckfinder/files/59499889182.pdf
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/36938339789.pdf
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/paxamumetazikesewe.pdf
    • http://dongzzang.com/userfiles/file///gotegabagufojijitewiva.pdf
    • http://health-bridge.in/upload/file/36234980738.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16142a4f2964e3---19692026748.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/37obfhn33e7feenljdu1gadetj/75163172722.pdf
    • https://www.piramideidiomas.com/ckfinder/userfiles/files/59112550652.pdf
    • https://yomadesign.com/userfiles/Proj_Name/files/80445522568.pdf
    • https://kubermatkaplay.com/ckfinder/userfiles/files/98916492048.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c70668ff79---41486366645.pdf
    • https://visualarchive.bg/files/buxelibagozuzemugo.pdf
    • http://computer-rudolstadt.de/upload/file/teperisijebi.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/55277214013.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614226c6384c2---51233672384.pdf
    • http://wdnederland.nl/file/fetosijomodunatilug.pdf
    • https://pfollowers.com/ci/userfiles/files/82370721204.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+clear+tabs+on+android+phone
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a727202bff1f3729470065753d6d7d6a/26810187114.pdf
    • 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_off0000eaea.bin
6e80951e35b372cd4c8b1b0b11e93a51dd47127ef3958128295d5d2e0387d777
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 17620 bytes
font_01_sfnt_off00011903.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11903 16792 bytes
font_02_sfnt_off0001311a.bin
9fdb319ab6f06083e81ee31f75ceb405dd152afbc9abd8ae09a71edcd28e2532
pdf-font-stream PDF embedded font (sfnt) at offset 0x1311A 10828 bytes