Malicious PDF — malware analysis report

Static analysis result for SHA-256 91c3386545d95487…

MALICIOUS

PDF

92.2 KB Created: 2021-06-25 22:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 334de756fe74f906b744f5cb92dcf5c3 SHA-1: 555f0e41b32b8798688471d0d2747e9cdd0dd7dd SHA-256: 91c3386545d954879405a4bcdcd2a5809e28c1c08bfbe7180671ff421dd3a6e9
196 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress upload directories and disposable hosting, indicative of a link farm designed to host malicious files. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's purpose is to trick users into believing they will receive a prize or funds, requiring interaction with these links. ClamAV detection and ML classification further confirm its malicious nature, likely serving as a lure for an advance-fee scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f5cba7708---26569039840.pdf
    • https://atraba-holding.com/userfiles/file/ledukosupexoriki.pdf
    • http://akcjonariusz.com/UserFiles/file/60867908585.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/kfulut9v1rbcb8judl2rte8p74/diwatarefelofasibanejin.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd4a15b81---wetofomikupaloxorur.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c5eb11d52---86186581535.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d2cb6664a---31764263474.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/ae6623f975ffc8adca08e9a828bf1a04/fefevatokarumi.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/394h83e9gfa8oipm8gvbt3k8uv/jopakijuvavamowa.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609410d1a3693---74101632016.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3f7ac361a---69764572783.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/or43cv9f8hf150mnopac8t8jb5/pitelawidowed.pdf
    • http://csc028.com/userfiles/file/20210609030351_w58gko.pdf
    • https://cortemadera.com/wysiwygfiles/file/pafukureto.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/44ba0bc3581cf728617573d8accc6abc/nefaxusejomomewiwasubidef.pdf
    • http://sofia-es.tokyo/yamituki-n/uploads/files/14777758367.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/0khlopjjmeghn0514s3sfao95g/bewupakekalero.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607438bd1d660---49719629343.pdf
    • https://schmitz.cz/res/file/17448601307.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073f1634dfef---92264503947.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/o4luvu3hsrkc6o7av6r90j7gp7/burajusowifututor.pdf
    • http://piqiso.ru/userfiles/file/36990764428.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/fdcb05395664b636450ab708bbab7683/nizemakamufukavomivizo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=roblox+injector+2020
    • 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_off00010546.bin
63b951ee326fce2735cddf5294d154e9ac60c10ac546d8e7fb63fec7b14347f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 17696 bytes
font_01_sfnt_off0001337f.bin
6d0f03f027fc0204b2b631e4aafaaf89d256cd90118aecf953743c72fd9538b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1337F 10552 bytes
font_02_sfnt_off00014bae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAE 16792 bytes

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