Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeaa9ebc94bcd87c…

MALICIOUS

PDF

89.8 KB Created: 2021-09-01 18:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77c1dc5da815ec93557c128d2fcee2fd SHA-1: 7c9f0415385b4857d0082ea07327c9e65565f8d4 SHA-256: aeaa9ebc94bcd87c785c5951446c1adc8303bf5f046ed3539abde075a02d247f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, directing users to various external websites, some of which are hosted on compromised CMS upload directories. The presence of numerous links and the nature of the hosting suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://morard-mcf.fr/data/Files/pitajilipotezaweduzo.pdf
    • http://fireprovietnam.net/luutru/files/jivavemomux.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/e01156783896b4cdad33b7697871d283/38193812670.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/c14lc912i845tbunhduf5q4jta/pejokatoxumel.pdf
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210823153209.pdf
    • https://eitmedu.in/ckfinder/userfiles/files/fitefekasemafefukuwekote.pdf
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/51410188824.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/eaea2f930e9977e49852f7b324a7055f/49811217342.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1611d0f18862fa---28697319992.pdf
    • https://canevastoilestjean.com/upload/editor/file/wogusupufavuju.pdf
    • http://fmi.lu/userfiles/files/10456105406.pdf
    • https://get-insurance.in/ckfinder/userfiles/files/kuvitopawomofemujubuzi.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608467987d11a---kofolutikotuz.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/bogipekume.pdf
    • http://thestarbusan.net/FileData/ckfinder/files/20210607_4915C92F7DB7F247.pdf
    • http://ifaistos.reality.gr/~triantaf/images/file/konusezabapelokadaveb.pdf
    • http://abnicum.ru/files/file/37458150635.pdf
    • https://alariel.be/userfiles/file/31293981291.pdf
    • http://bjbtrh.com/files/pic/file/78943001698.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/f64aadb6bf357a2b59bd17b8a648b6a7/nujasuwojujagogozilubet.pdf
    • http://mayinmaunhat.com/upload/files/93007764173.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/80n0rd2fbge84ik0si5pqr25h6/37332302328.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16123ccc641d2a---79449778396.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=interview+questions+and+answers+for+employers
    • 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_off0000f682.bin
332ff2ba8788c599b3e1934759bef8ede08f50eec064bb77340ef42d43308abb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF682 18456 bytes
font_01_sfnt_off00012567.bin
d8d95bba9f85a9837275b5b39298332b8e5532585ba5d8e29e91be3d2a699d9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12567 11120 bytes
font_02_sfnt_off00013f39.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F39 16792 bytes