Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14a7f6851245ea1…

MALICIOUS

PDF

87.4 KB Created: 2021-06-29 12:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bdd13c2996374a29491309b87140a949 SHA-1: 8a2c3b9c952e48273eced06bebf68cfef0a3199c SHA-256: e14a7f6851245ea146e038bde6551f2ec6c090bad18227db7fc77f8ffc78681c
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely intended to lure users into clicking through to malicious content. The presence of multiple links on disposable hosting and the use of UTM parameters suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080868545007---59484913805.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/00df78fca238d2cdb46ad8b18d7e1a15/labevuniwuzezaluv.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/024rh93ckus61tp46omb1d5hpt/doxupimilefef.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/4i8u9fm7sa3btkm0cqleco5eh2/30449019436.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b61b7c7ecc7---lebokutifadeliwawedi.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/91179335d79a7c6925bfedb1f7ff146e/jopoturamajapus.pdf
    • http://alituncer.com/userfiles/file/33460166071.pdf
    • https://argekaucuk.com/nbg/upload/files/78620212568.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2348d0ba---sitepivudewozakopot.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16083827ad768b---japisizofutomefusan.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/2gv3cp51uf2sbqqudtc7e66f8j/pifew.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c862cbd1e76---semidejudotasabobuf.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/02dc4d7e502ff5158025cebfca6bcd99/33487717068.pdf
    • http://wabasnb.com/files/fckeditor/file/213640161960a76b10efd4b.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/8b5995e88605aa7002bc73fa77c00a26/vameketugimaz.pdf
    • http://asiavent.com/UserFiles/file///75940561671.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=4+hour+diet+meal+plan
    • 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_off0000f58b.bin
2f70986ffc74c8cf7f9c5fe3b393585462ffff6455122ee69bbacb0ce52a0d30
pdf-font-stream PDF embedded font (sfnt) at offset 0xF58B 16392 bytes
font_01_sfnt_off00011fed.bin
acbb9a55ad97db05ba44823833be5709125d1dedb2501f8a1a18f92817eeba14
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FED 10572 bytes
font_02_sfnt_off000137c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137C9 16792 bytes