Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2e785cd29bf346…

MALICIOUS

PDF

71.6 KB Created: 2021-06-21 03:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159533b12fec789a835fc21af3c0af9d SHA-1: fec5596b64beb9e7fde741bd68f319d6de557478 SHA-256: 3d2e785cd29bf3461f218366e2af384d2166e4ccf8278d0f4381b8b72b73a646
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and link farms suggests an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://susta.vn/userfiles/file/popalarasiwujemesuteri.pdf
    • https://gyandeepjkss.org/userfiles/file/zudunizasukofunisop.pdf
    • http://esoftland.com/userfiles/file/gusumusorosem.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/6ac219f75fc81f28816e99da3c221ccd/39787365780.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd4240f1ec---87562257288.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/npje11d8c6a46cme5o60n0upa5/46436335685.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/1g6lmgqvqp0dubhi44e512q5jt/56542065657.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/74025310920.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/563082678b7d1436ef1ba71b1ff47ae8/84779826909.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608a502b09bac---59365552574.pdf
    • https://tailormade-sales-marketing.com/userfiles/file/28410267282.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/paledajafegon.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc0b01b6f8---dekagu.pdf
    • https://smsenerji.com/resimler/files/97976099496.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/fejonosokomosone.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/cc92c81d74c82679b089675c282356f2/bifukekinoraxub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=super+smash+bros+wii+u+torrent
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c23d.bin
a1d4b4ef63028827178241b03ad21f71b37cc5aca084a3cd06c9f9e03f503cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC23D 5684 bytes
font_01_sfnt_off0000d611.bin
a190372a2a1fcd59a62aacac7de231f3c1a33ad293a103626af59c8196cbc53e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD611 5364 bytes
font_02_sfnt_off0000e82a.bin
a15eb4917a3aa59fa81fc1b5772e0da75e8699b99cf26e3655e70bea4ab11379		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 12724 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.