Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02520511ab11b3e…

MALICIOUS

PDF

87.4 KB Created: 2021-06-25 22:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd02780164617de5f3b94e7f8b9df8ba SHA-1: 70c37fe59a66298f6b7d5745aaa1e167e15190a1 SHA-256: e02520511ab11b3e8bee4e3644a5d51a9d3321d17f17cd038a60101874d41a7f
176 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and IP addresses, suggesting a phishing or malware distribution scheme. The presence of external URIs and links to potentially compromised CMS upload storage indicates an attempt to redirect users to malicious content.

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0a219f486---lezojazedubetis.pdf
    • https://fertilizergranulatorprice.com/d/files/57537028593.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/aeaccf728f7b46716f0fd91c60cc84f0/komevifabuvabamupu.pdf
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/11223098534.pdf
    • http://proxima-design.cz/files/file/wapesim.pdf
    • http://bukharageorgia.com/sites/default/files/file/vusaporolumabubo.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160727ea7ae482---69176381589.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/fafd69f37d91e97094ddc7d6cad5df4d/sanaxojevunabadojup.pdf
    • http://homenet-spb.ru/userfiles/file/45497220241.pdf
    • http://championshipsportsrings.com/clients/23492/File/33788982900.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ojdu2qrmhs20oevifj52an2t34/46777825614.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/aeaa37e2a82f8612df3f35d3275aa975/fenelabazarideduloguwi.pdf
    • https://nslogisticservice.com/userfiles/files/65200401192.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077166d29b9b---nawubapegidawuvobinufo.pdf
    • http://onlineticketreview.com/images/file/golefabex.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089219dd0d5c---83667568897.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ie7duu4kbdpc74rie896309in2/76198336712.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608539ed473e7---75263636769.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/55ff634033166bffb977e38fe0fea064/botodavijasifaxa.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/506fa93650136f5ae305d4eca1596074/dokaverulexokejosolur.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c33c16e83---90098146136.pdf
    • http://airholic.com/UpFiles/WebEditorFiles/file/59706355165.pdf
    • http://amuseonline.com/absite/userfiles/file/jubibebiwenelu.pdf
    • https://hogozaty.com/ckfinder/userfiles/files/bizofavovoziraxapobezof.pdf
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/39086484385.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=burning+sensation+in+eyes+and+nose
    • 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_off0000f3bb.bin
3b40ecfe84c96a1ac7347ace251b0b420321e7b984ae6a3777e22ff8c9c6b787
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BB 16864 bytes
font_01_sfnt_off00011fca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCA 16792 bytes
font_02_sfnt_off000137e1.bin
d3ff9f9a8ecafafb4191dc50778375921143cbcf76eb51cfac6db91da6effcdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x137E1 10644 bytes