Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee1c7fa565a013c…

MALICIOUS

PDF

83.0 KB Created: 2021-06-27 07:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30c27db55d4873c722be5030a0cfa46c SHA-1: d2f6a6ac97dfceffd72604f44d46f514b40d802c SHA-256: 2ee1c7fa565a013cdf847f2b37c5e11dceb250a9555ad1c057be22751e02a9df
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://ssvacancy.com/ckfinder/userfiles/files/zokexamatikujirimozisobev.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/27777902707.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d69fe8ed05---34633818310.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be334182ce2---tumegokumerumana.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/3317da74770a14d972396a31ac635717/lopevupavarun.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088967261df8---turapovumovode.pdf
    • http://odpadykj.cz/UserFiles/File/dekiwor.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba867d07fd---87286930668.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b8222d8326c5650011a35e7a4a6fa312/gosemaz.pdf
    • https://alatheir.com/atheirwsfiles/file/gapasalasodojeredowed.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cbafef0e9d0---25314953258.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/7afa2atuj4vqqossvdf97rdrk5/25475423106.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160924fca59210---76058448812.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dc1f339b8---jagifedubome.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/g798bvo5ifelg4kq2s0t5l9bu2/63042663312.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c90efc8b4dab4b9d199ded1951e5527f/46661619996.pdf
    • http://bpsstudio.hu/uploads/mibisu.pdf
    • http://nuraski.pl/wsg/userfiles/fujafixipejejev.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43e7904557---41185665397.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b876c93d542---58650868401.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/27675a00e4a554d693ed708d034bf634/59722776652.pdf
    • http://fanti-fitness.pl/uploads/assets/file/koxagikobibopitosano.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/poqkqnnq0au4povmmjsf8mpif0/limokegozobasoba.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6785276ba---gatawazuneva.pdf
    • http://albino-pitti.com/pub_img/file/81242574044.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074587933c2f---84679170955.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=vbl+share+price+nse
    • 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_off0000e06a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 16792 bytes
font_01_sfnt_off0000f87c.bin
06b07fd561734f3933e71dfe0dc36da806c8cf0d3ccc1604fd1bdf1149907255
pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 17340 bytes
font_02_sfnt_off0001263a.bin
e9f66a2769479e5126392ee65277b757d96dba35c1ace4ad5da62107f89b785a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1263A 10364 bytes