Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebe6e976b3061e1…

MALICIOUS

PDF

73.7 KB Created: 2021-09-06 19:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 060453dfd181bd2abe5a06c647f8d2ca SHA-1: 39fe168cc069f9cd2d0766f2750a330a759d1406 SHA-256: aebe6e976b3061e181b2e09fe5b66e62c640eeb901149f9ff1c4a135de1218d3
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm pointing to compromised WordPress upload directories, likely intended to obscure the true destination and evade detection. The presence of multiple external URIs and link farm indicators suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/a64dc0351d952be3f9857c0553fe0769/45739449128.pdf In PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b803d4d3a02---13018663147.pdfIn PDF document text
    • https://apra.pl/files/file/8924802145.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/zobamixebugotefeg.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/19609148482.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fa184245771---83344738762.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/mawazokuziluradudo.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/gedimapibejarez.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/c1a1cvk1bs23s27erleqhtik4a/55497485504.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4a560eed9---vekupisiga.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160909da00bb2e---xadur.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/51434590349.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c65bd076ba8---59203666229.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/252f5um3dk5d9nrstkknqa2hi0/zovobujuvig.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/binito.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/vagivujasuxubosetilebobiz.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075fadc6f9eb---tenozolabewagibusu.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/91836825546.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/pnlbjlusc1vib4fttda56btr83/15635361875.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739982cd41c---wonufudoz.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b093158958d---84389536900.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/jpbqjpb0n308t0s8l1573h7en7/zepijesuxigivolebuw.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/2581597340.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/11284969396.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=parasitologia+humana+neves+pdf+onlinePDF 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://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_off0000babb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CD 16764 bytes
SHA-256: 569da3ed38a5d5edc255a385c90ec81157dacfba204f03b306f2e79086f15eda
font_02_sfnt_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 11112 bytes
SHA-256: ba75ea4c5da785ab73b09fdedb35b09489e61189f208d904d4b7694436828a48