Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c97c9adbc3909c2…

MALICIOUS

PDF

89.9 KB Created: 2021-04-04 00:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 927e4aee9ebf0acfc5cca35e2c378e84 SHA-1: 27933e3f39dc3e975145b5d7df99e1487c5f13f9 SHA-256: 6c97c9adbc3909c2404b8f75529be47a510bd50af6a890811a3dbfe7795d190b
134 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or scam lure. The document body contains text related to "First tuesday test answers", and embedded URLs point to domains that appear to be part of a link farm, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the ML detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://midufefew.ru/wix?keyword=first+tuesday+test+answers PDF link annotation
    • http://vowujebotoza.mywebcommunity.org/seated_core_exercises_for_seniors.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzilogabuwu/r7jhhed/free_sheet_music_petrucci.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369507/normal_5fffcaf0948c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_605d8a73cdc8d.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/chopeira_beertender_krups_127v_-_b100_krups.pdfIn PDF document text
    • https://cdn.sqhk.co/wokuvaxevaji/hjgg3ha/5774396246.pdfIn PDF document text
    • https://jofowurifizowaj.weebly.com/uploads/1/3/4/6/134684387/3921419.pdfIn PDF document text
    • http://jonotijero.medianewsonline.com/how_to_replace_bose_headphones_ear_pads_qc25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_5fd30fa919280.pdfIn PDF document text
    • https://sosatiga.weebly.com/uploads/1/3/1/1/131164398/bovejiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_602ca8475592b.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/KzVjcan/jixopatifemifop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_601fb10eb8967.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/miss_peregrine_home_for_peculiar_full_movie_in_tamil_download.pdfIn PDF document text
    • https://pusotovoxidelo.weebly.com/uploads/1/3/1/6/131637553/gorinedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujunuge.rf.gd/81970132838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34fc700-30db-4f24-b596-737a7b49544d/wogazowunepowujinofake.pdfIn PDF document text
    • http://belidepedusopa.epizy.com/nijapexavopow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e443b149-ad95-4b3a-b0f7-b48cf987a906/inferno_di_dante_gole_dellalcantara_2020.pdfIn PDF document text
    • http://welavozolin.rf.gd/noxekunewevodiduwibiferab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f5a3aa-776d-4e59-9df0-d25a09b777f3/husqvarna_450_bar_size.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/71187712917.pdfIn PDF document text
    • http://lemujiv.epizy.com/xubipavikur.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_off00011f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F74 4936 bytes
SHA-256: acab1323bf25bf05b3cdc82cd7f83a705ab3cd3b92a654609930405b3cdcf72c
font_01_sfnt_off00013061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13061 12452 bytes
SHA-256: c056b16dca019a44cdbb78ef1995da6f3e5f43d7826c074ff8232d645a0d89eb