Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8a21b15481ea88…

MALICIOUS

PDF

76.3 KB Created: 2021-08-13 19:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 389c65df85df2e3db2bab14aa83a17a0 SHA-1: f5ae31cc3cc13e934125434d0d3c4525cdce23bf SHA-256: 2c8a21b15481ea887ef6a5510c02f426665630b4364650ac453820fc52773297
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to PDF files hosted on compromised WordPress sites. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c959d91a3da---43647701375.pdf In PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/69724cc0863f0d0cb3719c3254aa5e70/53831196846.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/nuzujepizutatofajut.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/2814950240.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/8c1aa7be009b58d078ed72bd9a6d5e35/6342795567.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a87c07997d---loxazidamulibusixerusu.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/b8c0c4e3d760dcc0dfa283114e0c9a7b/52822073953.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/41afd4a72bd0298ddf9a32ff17d67779/60791304890.pdfIn PDF document text
    • http://iviltra.lt/images/files/redinu.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/tikal.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b25974eee---kabowadozavajiwafamejib.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/11450398593.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/6uouitm2prqrp3brce2al4f7le/17077092123.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceeca720fa1---begalezutopazajup.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/18149509233.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bgq7l193ltucu7o3c7ksnog8f6/92708411381.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608e85c624bfc---73109103911.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/4eacce67c387b46902051c73d2ce83c3/repumisugadiga.pdfIn PDF document text
    • http://simonide.org/userfiles/file/lixevumivawofer.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbb727f10f---xevojak.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/zokuzuvi.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/rijaxizugoliturevonatimuj.pdfIn PDF document text
    • http://trevorhannant.com/34172831031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=lyman+cast+bullet+handbook+2nd+edition+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC672 18788 bytes
SHA-256: e3e37b905825700653cf423db3304a39670a1e0a9f957695726d73da1b651c4c
font_01_sfnt_off0000f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 11308 bytes
SHA-256: 288de03a67fe75b129187eea18c817d1ec371ed575103e388c97acd8164ca562
font_02_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.