Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c0a749fcbc41a8…

MALICIOUS

PDF

88.3 KB Created: 2021-08-02 06:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e95f0933fcb3d3fac4399c1bd7385dd6 SHA-1: 1cd4f113c83cd6931b9fd67c9bcd890304c7a53f SHA-256: 32c0a749fcbc41a8c610b45e9b625b58d028041e099c67437989cc6fa167f2b3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a link farm is sufficient evidence of a malicious attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c31277456c29dc03c2b552aafb09f210/jafulep.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16089e01bc8f7e---64081765968.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/nudololisotumavaful.pdf
    • https://darshanam.com/ckfinder/userfiles/files/fakizolubed.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3c7133e0---33395777056.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbe0490a4a---daledezar.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a8bab20eb---98485899444.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607f67eadce98---darowejepu.pdf
    • http://tamlaproject.com/userData/board/file/walinerujiwof.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa6fb717d7---47492256469.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d46c0c0dbeab7ccdef6292de71d82c09/45752361963.pdf
    • http://bidmitt.com/img/files/file/58745313815.pdf
    • http://reanda.com/jingkelun/userfiles/files/20210530111627.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082f2f15e7d9---96398232815.pdf
    • https://5of7edwardstreet.com/assets/media/files/19089559604.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/49d0d44acfcf505f70ba57f2159342b5/laxedexepisepalati.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6999b7ebba---89389150740.pdf
    • https://akproauto.com/nbloom/fckuploads/file/guwatakexotopebexi.pdf
    • http://smart-ventures.ch/upload/Editor_Images/files/69621663629.pdf
    • http://scottleddy.net/clients/862555/File/78410439019.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ldh17asf508e9nrjf7cj0i9u5b/pigeloji.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ba61287d8---fiwubokezerosibofad.pdf
    • http://syarmarka.ru/userfiles/files/66871697957.pdf
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/ii0l0qu6ekrhk5d9drb5ud9oj3/tajatikamotekaf.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819a132f4ef---napejibozagerudazogeb.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/oj9its4a1lj4b840af9imraeki/23525752350.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+do+group+payouts+on+roblox+2020
    • 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_off0000f357.bin
aff4186012d563c1cdb9b12e1e130eefba31ed4af22bf6571892e8ddcba8c0df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 11120 bytes
font_01_sfnt_off00010d15.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D15 16792 bytes
font_02_sfnt_off00012527.bin
1982292ca269978a8999c4362fb217cf220fee3d869ad71db8f6e9379cee6563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12527 17532 bytes

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