Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18e102e726beacd…

MALICIOUS

PDF

206.3 KB Created: 2021-06-30 20:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9801a254b525e8c315a306e911e91340 SHA-1: 7dbae43d97e670c75681a6449101306b94d3e7c3 SHA-256: a18e102e726beacdc36c7c7afc266ba24b1e598a2026f344a6e3be1cf509ee98
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1203 Exploitation for Client Execution

The sample is identified as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to compromised WordPress upload directories, suggesting it is part of a larger phishing or malware distribution infrastructure. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the heuristic firings strongly indicate a lottery or parcel delivery scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 6

  • 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.
  • 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://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c806e1b796---58079256525.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecb3a5fdac---pidubulu.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a08432e58f---likirikokumivezulijaxid.pdf
    • http://xaydungphongphu.com/uploads/files/ludokolo.pdf
    • http://aryajob.com/user_upload/file/68592063026.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/pr268o7j4i3rluu3vcl4d4igsm/lodakanibezorizimozenuda.pdf
    • http://logisticsnetworks.net/ckfinder/userfiles/files/puzatukotejavilivawimega.pdf
    • http://meteosputnik.ru/userfiles/file/lejavi.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5beba594a20efbfd75b185e1cf0e8b8d/82903679086.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2e093586c---lefizunorisiripox.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/e2e191695cdb204f48b38afab9cce4c7/11697399554.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076175fc7c79---50534671816.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086070b0eed7---gemupuj.pdf
    • https://gionggiacam.com/ckfinder/userfiles/files/74825808594.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c956a795f6---71492512289.pdf
    • http://kapsalonvogue.nl/files/file/rovukoregojukamato.pdf
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/jipedoba.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/o0dmeuiqrivrvsp94k476l1k63/70358888735.pdf
    • http://eurekaelearning.com/upload/news/file/46121654667.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/55843b21da99532c934193e14beb9671/35616684593.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/626236cc64b139c284573e2ffc334677/mudusepadoji.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f803f460f7---82065229844.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/31889f43955a2df39a2727de7bc0fd11/39314468469.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/cp5mekft87vo863skjke4vnmf0/nawigekigusozavos.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/negbvadl2mkqcgb2k23e3tgnb1/47599362936.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=persuasive+definition+fallacy
    • 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_off0002ca2c.bin
465a53bdb6afcf98b7337a782dc74108c0ede66a16a3e429eab7b2284c613cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA2C 18316 bytes
font_01_sfnt_off0002f9ab.bin
3835b02a62117a20d56a7ac3c807b5d8bea4ff0fbb24cfcf6db7e5c908e5f890		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9AB 10752 bytes
font_02_sfnt_off00031298.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31298 16792 bytes

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