Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a3b2a469acb36a…

MALICIOUS

PDF

94.6 KB Created: 2021-07-01 19:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09bf64e99c2225cdffda547d1c11753d SHA-1: 4af67158aefee5f24d1afeed4e5fef88b0de44ed SHA-256: 48a3b2a469acb36aa94d9cc19e521d1bbfb17d6f62f422591b60196a99ffbfea
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, many hosted on compromised CMS platforms. The presence of numerous URLs, including those on potentially disposable hosting, suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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
  • 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://fence-alarm.com/userfiles/files/84973287921.pdf
    • http://motorlustor.net/userfiles/file/naxeke.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3c1451192---taripifogexagi.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c928368925a---tubenazazosegunolago.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/pbeni76lgta7fcb35mi41l5nuu/biremajabifan.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/08347d09ea24246d2d1663e87588415b/sefikoruza.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/bb07f26694e5e2754849a6b2a0c2c99d/kavemilanirorubajizutetu.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb197181ec---mimapanaxa.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/61411f4eab917b3f8fe0b0b83cb22c79/49898841222.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e35c07c00b---diwagebalirikizudiz.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160942567aec87---fagomebisibasogemagiweka.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/65851cad39ff77ada86ba3c25486e2f0/lisit.pdf
    • http://zjqzzx.com/uploadfile/file/2021060921065673499.pdf
    • https://oncallanatomist.org/ckfinder/userfiles/files/21558415206.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/dc844fd94f197b6c877d6927bd1b255c/66578581009.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608759ed26b55---40974754383.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1ce3d81cf---tujatu.pdf
    • https://iringmalaysia.com/ckfinder/userfiles/files/34947013605.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160abe1d4d5aea---66420171054.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/e794bd26271f271d9c70d7beee89a0ca/xerevufadixasojo.pdf
    • https://atkarisuli.hu/userfiles/file/96769768939.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/37ae7b7eea883d62106fdc30ed405771/gubetajokopiwa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=wcf+and+web+api+difference
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb71.bin
e018844d800da6b2e1e1afaddeb7718da1f45aa5b01b6c5685630027d45f1601		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 10400 bytes
font_01_sfnt_off000102e5.bin
72b6d5534888ecec27fd68dccf88827b5fbc3510db23809d90398b76a33fedee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102E5 16304 bytes
font_02_sfnt_off000118d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118D9 16792 bytes
font_03_sfnt_off000130eb.bin
8a4f80f6b09fcf293dcd23ab3854661690035c04dfa4d7935ebfc42e473b3ba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130EB 28052 bytes

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