Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cce7a6d2ecec99f…

MALICIOUS

PDF

87.9 KB Created: 2021-06-28 13:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 28709776f515926dc10b560bee6c29de SHA-1: bca24e501bf81b923402c6997da0a00079c665a3 SHA-256: 4cce7a6d2ecec99f1c0bac0aa3ac7d87f2bdcafdc1c43fbc204993ad3fa25bb4
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or for SEO spam. No scripts were extracted, and the document body was unreadable binary data.

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 https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/7b04580fe063e9cb82481fe5cb765b79/8333121785.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160805360010b6---mepoxuvesavabe.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a30b3d0f09---boxijakuf.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b568fa4d602---60173188358.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a452aa5768c6808e4315c622f2ae81b3/42401470245.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dd1ed7f58---temefasubuwawopibapijox.pdf
    • https://gw21.ch/uploads/userfiles/file/55874845552.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab58ad2c239---pafulik.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/777cc2b8930f3b76a4c46a578ab76485/10514030049.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/jidifigotovaxigefilizu.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-5-18/20210518080514203108.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/v6e4ujaortdttee9u3u4ntvrkr/dezuwemizex.pdf
    • https://hotelindigha.com/FCKeditor/file/gusexijudipole.pdf
    • https://telenovella-bg.com/files/fajiwesokokomosi.pdf
    • http://ohstigers66.com/clients/d/da/da15611725e7ba20b6827cbf2e24f87d/File/73985774508.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4595eeea7---90911691982.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/23c82eb82b385ff9007d8fe5e7e39020/72583373630.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/5df71ccfbc76e33017459b127867a602/49229075867.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/kjj0g5ekbpvok7q0uu7r0643h5/98765035058.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3ef84dfba---sibilobaxutiga.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/fqcq5d882lbnb1oju5935b0v0o/birugadokokavegimaxi.pdf
    • http://teifsepahan.com/files/file/rapijozaxipogasuw.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983a3f4db96---84591686451.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce26c7ac5e---naxabemevilulofol.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ed+weeks+mindy+project
    • 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_off0000ee48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE48 16792 bytes
font_01_sfnt_off0001065f.bin
7d5d1dd6e751f3c1f115beb69ee154b012f8a7a1383b9489a5fccbe7ac808c2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 10872 bytes
font_02_sfnt_off00011f7a.bin
0c0517f207be1b603d4493ca8da137ff6efb0c3695a7db146449ab28c7ad43c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7A 19320 bytes