Malicious PDF — malware analysis report

Static analysis result for SHA-256 2404527030ad476a…

MALICIOUS

PDF

75.1 KB Created: 2021-03-22 00:03:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 05e1c7ae6794dc84701ebf7aa748e717 SHA-1: 49e9b4e4f2e880ea704560b187f79a06158af949 SHA-256: 2404527030ad476afba82b80176a68233474a3c4a70207bccee8b79622a9698a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though truncated, suggests a lure related to 'C book for beginners pdf', indicating a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/strik?utm_term=c+book+for+beginners+pdf PDF link annotation
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/nakipifagupig.pdfIn PDF document text
    • http://shop-onlain.fun/geritudavosigabobozuk5ao9f.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/68188600100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_5fd7dc9d7a204.pdfIn PDF document text
    • http://idealica-columbia.site/2._3._seleccin_proceso_y_herramientuufkm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489733/normal_600c0553904c3.pdfIn PDF document text
    • http://uscarinsurance.info/66771710659vqaq9.pdfIn PDF document text
    • https://wojaduzojipoj.weebly.com/uploads/1/3/4/4/134467580/0d912.pdfIn PDF document text
    • https://nefatalij.weebly.com/uploads/1/3/2/7/132740339/c27b8.pdfIn PDF document text
    • http://zedateve.mypressonline.com/wabipevakagarivawexelegu.pdfIn PDF document text
    • https://tunutepefa.weebly.com/uploads/1/3/1/4/131453603/8b1ec0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_5fe9e49f60759.pdfIn PDF document text
    • http://myluckywin.site/hcm_full_form_in_police79seq.pdfIn PDF document text
    • http://vazagitomis.mypressonline.com/25935411287.pdfIn PDF document text
    • http://topchambre.xyz/brahman_naman_movienpaus.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/pewebopufupe/xamivoxer.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/morisirobanonaxi.pdfIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_5c5c47d354754022ade5883f8a63d02a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/red_smooth_mini_dachshund_puppies.pdfIn PDF document text
    • https://c20a02f1-eded-46de-afbf-2d7328e03b26.filesusr.com/ugd/c6fd25_eeb880eaf7c5495fb5634f3ed8b1533f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/ldpe_sheet_weight_calculation.pdfIn PDF document text
    • http://wutorokanotomav.onlinewebshop.net/the_magicians_season_5_review.pdfIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_a72c0b512607480db482609128a7f809.pdf?index=trueIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_fce193cf762a4c6c828ade248eadb9e0.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_off0000e89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 5076 bytes
SHA-256: 942e6a66b346e0b2c23e29f5da2bade5bcbaebf13c68fc5a05ae756ffafdcdd3
font_01_sfnt_off0000f9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 10848 bytes
SHA-256: b9311740d58c4b354d02007ebae77384953a58275dcac454d20d48d54d796ffa

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