Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba770a95a936836…

MALICIOUS

PDF

84.8 KB Created: 2021-07-01 18:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c1e0fd894187f9dce884f59c6c1f2de SHA-1: 4bf6fe3113b8b6ff36e4c2fc6505e248965197b2 SHA-256: 5ba770a95a936836cb22c416a16e1b32353fa061ed52bf0ef012d63e72d4110f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating a link farm used for hosting malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's purpose is to trick users into paying fees for non-existent prizes or parcels. While no scripts were explicitly extracted, the PDF structure and the nature of the links point towards a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18b354a3ba---8596012941.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/5d9fc20ceef696e9ad5cb471efe1453a/42365627669.pdf
    • https://saam.vn/images/content/file/32581717578.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160939ff9a7d0b---52381251689.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095f7168a17f---melokikisa.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/5d426bdeebf2d42b205900f4eb6c2f28/30158142581.pdf
    • https://denimder.org/resimler/files/79421187424.pdf
    • http://drairtools.com/ckfinder/userfiles/files/57085586678.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/0505b6fkdflr5628s8tcktjaec/52723882823.pdf
    • http://beta-rc.com/upload/files/fafofusopanejujejin.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/b2b832bfcba556462e97df5bbfbc2263/mipalodojin.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/958f4d8e0408edca9303febeeb28a839/negapojupizififodapezi.pdf
    • http://debten.net/UserFiles/File/54356907303.pdf
    • http://ash-graphy.com/userfiles/file/19998013409.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/21afb4e586a55fd39a501098494917bf/kuzuparozesevibofa.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c93b884ff625408708d79474d928daf5/lovezudokazazobe.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ddbc5403a---79738484610.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc658ab02---84399989307.pdf
    • http://jshtextile.com/UserFiles/file///kaboxikegosesejovarituj.pdf
    • http://mt-filtration.com/uploaded/file/153573602560c2bc3f298bf.pdf
    • http://lahma.pl/_u/userfiles/file/wadufabesezipulebev.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/eimvmav4re7pvr6o3tvs8ljqsu/89360163105.pdf
    • https://gloriamus.org/Uploads/userfiles/files/41186207616.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=device+migrated+external+hard+drive
    • 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_off0000e887.bin
be0693c73646e8985743c2dce05223ffe052a316b0c753986abd8b0d92271125
pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 17256 bytes
font_01_sfnt_off000115a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115A6 16792 bytes
font_02_sfnt_off00012dbd.bin
2c3328e9375f9cd1eb2221d6e91bd77ba8f0980320b3f99874ce649115cca100
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBD 10696 bytes