Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ecdf18b73a7e9f…

MALICIOUS

PDF

94.6 KB Created: 2021-07-04 15:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd7e00bd86af2cac371c8476f219d3ce SHA-1: 05b9e3759443ec6dcb512030a6cd003d519dbf81 SHA-256: 08ecdf18b73a7e9f9ae8068413ee7853b24c6bdee0d6a1275c29178f49ed2c92
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to lure users to malicious content. The document body is unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607195f4d93fe---masatarekafomod.pdf
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/60e1e9cda8f5d2eeedd7c53d18770a48/tabogawogi.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87c3a0ac64---59206784491.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16090bf3677b93---senipi.pdf
    • http://nmglyxx.com/userfiles/file/23590762847.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8a19e2b83---99251092104.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc092c1310---62097905829.pdf
    • http://tunglamgarden.com/images/fck/file/31725180588.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb06904808---vusiwozagizapenisemexu.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bd525039090---lojig.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/6lpdd17ou8717puhrmnehpsf5f/43396032209.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/bqrhg0kk3h29rjsb2c8bhcsru1/58341633824.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b762b0228c3---8500353720.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160975da275a6f---34644378896.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/6lpd60hof7v0l0edp5j558kvpg/tizogi.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/e91c93cf560d71c101e5329cda56c70d/28637692687.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853b5ec016d---1560344874.pdf
    • http://muzycznescyzoryki.pl/userfiles/file/vepagewunamizukakedunogo.pdf
    • http://lltsg.com/uploadfile/file///2021060210461598.pdf
    • http://dok-vo.ru/userfiles/file/55591238490.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ehtpffhusngsb462c593q0eor3/dojileguju.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/cec8123ba09ca8d7c24394810091ca57/fumerej.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=keto+diet+and+alcohol
    • 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_off000111bb.bin
c08f0c0a99da6137a14ea034e2db1a03063785ce2d75e357b8c92c57db21e55b
pdf-font-stream PDF embedded font (sfnt) at offset 0x111BB 10188 bytes
font_01_sfnt_off0001286f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1286F 16792 bytes
font_02_sfnt_off00014081.bin
145592b5f2027dd7533ad07600224912fcb05f3f59be7672a6b01de832ccfb11
pdf-font-stream PDF embedded font (sfnt) at offset 0x14081 17256 bytes