Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c278d103fcd4a9f…

MALICIOUS

PDF

80.1 KB Created: 2021-03-03 03:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0561dd1a6257a126e56994d97fa17b77 SHA-1: 12434847aeadd3e9f15b7d8577f7b4ba460c9a32 SHA-256: 7c278d103fcd4a9fdf16fc14dc5ac9d444dd96a6dd53288bfa66e875a385f865
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=the+efteling+rides PDF link annotation
    • https://cdn.sqhk.co/mijajijem/ejibia0/shoot_em_up_carrot_death.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_601c6531b15d4.pdfIn PDF document text
    • https://vipofobusaxipol.weebly.com/uploads/1/3/4/2/134234766/4815296.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/hcf_and_lcm_worksheet_ks3.pdfIn PDF document text
    • http://dokojekiferej.mygamesonline.org/lab_report_biology_photosynthesis.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/nuvukaxogudadoloseveropis.pdfIn PDF document text
    • https://navitadewota.weebly.com/uploads/1/3/4/0/134017874/xanetopijevil-rawawo-dovofenosuzi-vavugeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421629/normal_6012c32963345.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/TjbjhDd/real_ht_home_theater_automacao.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/jegif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_5fd7c76b132ac.pdfIn PDF document text
    • http://sifimomikev.sportsontheweb.net/67126468239.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/QgiJh6P/ribonunewemadedavix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449629/normal_602179a3338ab.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/eificib/xifex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425230/normal_5fde3e0b7ef36.pdfIn PDF document text
    • https://jateredadiwez.weebly.com/uploads/1/3/1/6/131606262/babobanorig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/samsung_un40j6200af_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/handwriting_alphabet_letters_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/alphabet_worksheets_for_3_year_olds.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/rto_vehicle_information_mp_by_name.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/vevagewizeduzudiwejolive.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_off0000fda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA6 4908 bytes
SHA-256: 9b16702336d93a06f494f5cbc688a654a68a5305383b3c60bc6ad7af6230d3d8
font_01_sfnt_off00010e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E54 10360 bytes
SHA-256: f54d2eddbdd15c8cf8e6f760d7f2454835aef80dd56fafc4ae643db4970aff85

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