Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a15dadcb17d57e6…

MALICIOUS

PDF

85.9 KB Created: 2021-07-06 15:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8a22b4e55f611fbbfc4ebf19aee10777 SHA-1: cbba7b68e52139e1ce649657148a98e02dea99be SHA-256: 2a15dadcb17d57e632b12aea9e09b70b39f13df7216f1d3957115d0b2eb26f6e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to compromised CMS upload storage and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns align with common techniques for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://artecgroupservices.com/imagenes/file/zuwediwazenetopez.pdf In PDF document text
    • https://superpart.com/files/11212400271.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/75793001343.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/63355340579.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/xukulixujameji.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/ip5p8q7dkvt1kv9ff6p8s8nlhm/31743369776.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/dfa5b1f1a736b6fa2e635445554e0f63/ditodugugejirirabofa.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/mirawekikalodawonido.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/81ofp109b9kp8i5j31mh5j9d7j/74026869633.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc437673e2---dutugapu.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/2kshkpm8kirdbr69p6196d7pa6/sijozubuwu.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/7bbf6c68da16de3b339a3d060fb56aa4/74744365123.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607780dd4dfd3---36889126699.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/pidudatejene.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/62092009527.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c04e9d67bfa---tajugiridinor.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/9ad2d95c1f50139b9285d1a05b1bdbdd/vuzogowokudo.pdfIn PDF document text
    • http://ausafe.net/images/art/files/73385913972.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/42698b05ddaa26369f044d39999215a3/68534924993.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727c9499530---bunuvawomowasimomir.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/69792036819.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/1ddca5b3a51ace927813c032e3522fa1/6344122225.pdfIn PDF document text
    • https://le27.fr/docs/file/81159737227.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e45261801---93765014367.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=lateral+and+medial+pterygoidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3A 10640 bytes
SHA-256: 7bb3e103414da932668968af95d1082d329292a87f363e2effd69892045de412
font_01_sfnt_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 17948 bytes
SHA-256: 7b730d726f3af5caf5c446814815a1be8e6cf9cb822aa5baa8ca30f8b0d4c46c
font_02_sfnt_off0001324b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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