Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c973530f048e7e…

MALICIOUS

PDF

75.0 KB Created: 2021-03-23 07:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9e4b37b83ac3a7778a357cad52d17789 SHA-1: 30336eaefa5313623f1dc54e2cc05f8900554c09 SHA-256: a3c973530f048e7ee852fdea293dc4735249228471ca88977f839d571af8568f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple external URLs, with at least two pointing to disposable hosting and potentially malicious content. The embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=marvel+scientific+ice+maker+manual PDF link annotation
    • https://wuzovogupo.weebly.com/uploads/1/3/4/7/134720757/4594828.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/telav_wagel_dugokosuximav.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/cjjFGgh/65174194762.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/ih1hiTK/prop_hunt_fortnite_creative_code_farm.pdfIn PDF document text
    • https://jatevabuxises.weebly.com/uploads/1/3/5/3/135382810/a17fa66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5fddd6423fab2.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/xjahjEC/idle_planet_miner.pdfIn PDF document text
    • https://cdn.sqhk.co/subogutaze/hXHkLia/40989656471.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/dA9givs/fuledumulelav.pdfIn PDF document text
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/relotozebajan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_600dfcc55b27b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417814/normal_5fe63d7b2d18b.pdfIn PDF document text
    • https://cdn.sqhk.co/gorusuvu/IgiuYK8/adjektivdeklination_mit_unbestimmten_artikel_bungen.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/ganubifirigevi/reference_letter_template_for_teacher.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/jeep_grand_cherokee_2012_repair_manual.pdfIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_0eb6119843214e6f9367cd027882e926.pdf?index=trueIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_5813dbdf49ee4a19b61da79aa9749863.pdf?index=trueIn PDF document text
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_b7eaf4d986a2411ab29c0288bbb51536.pdf?index=trueIn 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_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 5156 bytes
SHA-256: 990a1dc7b14e11c974e5292252018f3684c77df633f5d3685fbc61d9e990eb23
font_01_sfnt_off0000f9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 10816 bytes
SHA-256: c12d04e47baa220ff8068031b51f5200d400fec78fff7de3ef4c70ee6c093ec4

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