Malicious PDF — malware analysis report

Static analysis result for SHA-256 4960f61562f9c455…

MALICIOUS

PDF

77.9 KB Created: 2021-09-03 09:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 33d9c51874e26d5905e1f07d14d535fe SHA-1: 73c3364b08dd0212948148cb4224d8ad57f9d244 SHA-256: 4960f61562f9c455f1670a1b77505b42ad4cf3083aaff4f6488cec986765b60d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable domains. The primary purpose appears to be directing users to external malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://allytemp.ru/uplcv?utm_term=rctimer+esc+30a+brushless+motor+speed+controller+manual PDF link annotation
    • https://roc.mn/uploads/files/42203149579.pdfIn PDF document text
    • http://facades-et-traditions.com/actualites/file/vinozesepezajagopipubuf.pdfIn PDF document text
    • http://landpas.pl/upload/file/66225248913.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/30758223242.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/re796vk6u0coqgc7mlr640fn7e/50090732086.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/97454984700.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/fuzumilibeduwo.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/36934130642.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ro3jocu9amgg59r6h9ajhptc2p/jowewaj.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/lujupeminotawagirezakenej.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/70035693072.pdfIn PDF document text
    • http://angeladaniel.de/uploads/files/2709038101.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/wobowikufixanurid.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/vexurubuvupogivug.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2150032d11---dimexud.pdfIn PDF document text
    • http://sun-eko.eu/files/file/foxunefunude.pdfIn PDF document text
    • http://canadanur.com/resimler/files/46358818006.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3f95ce27d---sizibuvalinisegiv.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/34391247399.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/tafuboki.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/57190234836.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16071e3e2273e4---futixoson.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/ba000de029d77f5cbd31ac0985bcd864/xetuxadevizepunafikolivet.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6d79de1d972a63cd2c6f30b6ccc673ed/kekelopidefame.pdfIn PDF document text
    • 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://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC925 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 11356 bytes
SHA-256: 9af98a92aedbc2d029d9c7733139cd1257ada559f3364ba031568312a3ee89a6
font_02_sfnt_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 17952 bytes
SHA-256: 13501898cc2e9ec354a00e7ef551aae13728355f20a21475620fdd2657390b4e

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