Malicious PDF — malware analysis report

Static analysis result for SHA-256 a026d1677110ffa1…

MALICIOUS

PDF

76.5 KB Created: 2021-04-01 05:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 220a9e4204f2e1f5c993ea8c9823ae4c SHA-1: 583cd3c47b95822828767c5f1a254d00588f1bdb SHA-256: a026d1677110ffa1c3f463d3ca96f4b83c01500436332496d87efef8c2e29103
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=managing+complex+change+chart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407331/normal_604e1df2dbf6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485711/normal_5ff53c0eb3477.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/nieWhjo/software_data_cable_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/JMgdvjh/gimagezibazupudizari.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_6007ab51dbd7a.pdfIn PDF document text
    • https://cdn.sqhk.co/liralimujote/ehjjc4R/78795652374.pdfIn PDF document text
    • https://cdn.sqhk.co/jututumogu/YgGyLgh/43572285731.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485718/normal_60031886bb240.pdfIn PDF document text
    • https://cdn.sqhk.co/donuvoduvedo/mrcujjH/dynamix_p90x3_moves.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/lrcDxhf/vemeniwigijawigon.pdfIn PDF document text
    • http://gekolawidope.iblogger.org/arquitectura_sostenible_articulos.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/cUFKheJ/sikalu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/twilight_saga_full_hd_hindi_dubbed_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c069bf1d-b42e-4138-ba68-f7f8297bccbf/wolfgang_puck_pressure_oven_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a794ed-97f1-4c7d-9ce1-006bb17827dc/soccer_training_fitness_drills.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/34898274706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11ecf16-36b7-449d-839c-76a42a7f74f8/virufenetikolobuko.pdfIn PDF document text
    • http://juxenemijoguku.rf.gd/sawuxap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71770557-da5b-436e-baa6-2c175d9cb955/zudafifiloraxodogawojuf.pdfIn PDF document text
    • http://navezozewa.epizy.com/carpentry_and_building_construction_feirer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0164a06b-6bee-4698-a2e8-045494ca10ab/79108608855.pdfIn PDF document text
    • http://lujubozugib.epizy.com/namajexim.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 5240 bytes
SHA-256: 52ff392c5ad9da9d6f2030bf73ee92fa154e297bd77119ecc20c3227df2ac265
font_01_sfnt_off0000fff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF4 10852 bytes
SHA-256: 4f60b51f26b70597bff7463688964a85281529ddc86567cc6dcc0992d6ea5b8c

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