Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f26cce32d097202…

MALICIOUS

PDF

94.2 KB Created: 2021-07-01 12:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed83cab99549d69412fbc13319d69094 SHA-1: 6d16fdb98716e70cc2640e21879bd1f95f19450e SHA-256: 1f26cce32d0972029de542d0fff255429ddaf9f7cfb05537d59959a2a4daeb29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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 https://cructi.ru/uplcv?utm_term=online+marketing+packages
    • https://anpheatingandac.com/nbloom/fckuploads/file/xiveb.pdf
    • http://nowyhotelik.pl/userfiles/file/36571778512.pdf
    • https://service-panev.com/userfiles/fomifubonibafivegofubotol.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/b2jqldqi83mdedai0p4k21fn16/lovudikogad.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/c2561052b9005272d9af99fd20aff484/68780995971.pdf
    • https://wecareprogram.org/images/file/ririvutodibi.pdf
    • http://papianiarch.it/userfiles/files/paxosujeza.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b741531f7---35010420404.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/cf1c7430f8977428d47ec994539ffde1/70299608568.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609547171911e---12901701268.pdf
    • http://emke.hu/uploads/ckfinder/userfiles/files/69879888530.pdf
    • https://kovosluzba-praha.cz/res/file/44538971798.pdf
    • https://emmaushuis.org/pages/37513937326.pdf
    • http://constantcontinuity.com/membership/data//files/zolijekabeboxobemupopo.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a1d882e8c---wanulejufefebufaseba.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/1c3b1bd5881a1a8a89cfe2a53b266006/46232257132.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbd66ee78c---rowudapuwilemavugiruw.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608752674a3e5---23863952704.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a798b638f3ad3f58d0dbf92cf07d1c67/74510328128.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608235a40b055---45936979688.pdf
    • http://oreade-breche.fr/userfiles/file/86292420553.pdf
    • https://quangcaowebsite.vn/uploads/files/18396575146.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa09c0222d4---lijemiluno.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/63cc12b2a090f6cdeb04fdaf289de32c/mewemore.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/2214tedtnsek5lcd300u7fmre9/bovanirulijejivekade.pdf
    • https://congtydaihai.com/upload/files/20886150006.pdf
    • https://bikidi.com/UpFiles/WebEditorFiles/file/livurenuzezafosi.pdf
    • 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_off0001100f.bin
93cb061b39e6f37acc73fa97aa94109c4092c5cb081fc698741c21c451f8bb6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1100F 10716 bytes
font_01_sfnt_off000128b1.bin
5ac3ad1f43dae339c8b474c2032c0a7c764b7f0a86146703c391069f2e23624c
pdf-font-stream PDF embedded font (sfnt) at offset 0x128B1 16852 bytes
font_02_sfnt_off0001545b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1545B 16792 bytes