Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f82128b7b30b25…

MALICIOUS

PDF

90.8 KB Created: 2021-04-05 15:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cc2fc7a69edc0a40e0f453c18a0b6ca0 SHA-1: 7bdeb8a36a95ebbe44d6ad6080add11e04e5b4ad SHA-256: 07f82128b7b30b250b2e1070534ccb647bcc1e55f1cb846952a35cbf5f030314
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text suggesting it's a lure for a movie search result.

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://resalured.ru/strik?utm_term=leo+tolstoy+war+and+peace+movie PDF link annotation
    • https://bamutemo.weebly.com/uploads/1/3/2/6/132681362/284487.pdfIn PDF document text
    • http://vamefegali.mywebcommunity.org/daily_use_english_words_with_meaning_in_telugu.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/classroom_rules_worksheet.pdfIn PDF document text
    • https://sinofokum.weebly.com/uploads/1/3/5/3/135316266/3403104.pdfIn PDF document text
    • https://zozesikijep.weebly.com/uploads/1/3/4/5/134586683/ruvakoke_xizupepisijewi.pdfIn PDF document text
    • http://delojenopow.66ghz.com/mandatory_reporting_victoria_teaching.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://komiguzuvare.rf.gd/algebra_practice_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/40243479704.pdfIn PDF document text
    • http://tevaluzax.atwebpages.com/zetogexoxade.pdfIn PDF document text
    • http://zezexobufimorum.epizy.com/buvilekunol.pdfIn PDF document text
    • http://memokos.epizy.com/a_short_biographical_dictionary_of_english_literature.pdfIn PDF document text
    • http://xadogugatu.epizy.com/5734398239.pdfIn PDF document text
    • https://d7301f0f-9730-4f6e-9d95-601e203cb770.filesusr.com/ugd/253413_d95c745cfd384872bb58d8c58d5c0b41.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_68fe2663361040f3b5016de4500680ba.pdf?index=trueIn PDF document text
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_60386e0be9a64b32982251c3945e3cbc.pdf?index=trueIn PDF document text
    • http://nixomirorubu.myartsonline.com/can_you_make_pasta_dough_in_a_kitchenaid_mixer.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/46206223819.pdfIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_aa394a8285a847b593eeeefaaec909ae.pdf?index=trueIn PDF document text
    • http://dupetomumipur.rf.gd/59932693290.pdfIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_240adbd9755e4ddb89343fdd2e748c52.pdf?index=trueIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/die_kleine_raupe_nimmersatt_buch_gebraucht.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AD 5200 bytes
SHA-256: 0367f20a53e8c3a7d14d9adda7ca84f7f1f6b75bf776ffa651c8a1309e7fc0ad
font_01_sfnt_off0001275c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275C 12580 bytes
SHA-256: e887c95eeff02bf3cb10adef02efce336d2954f2be752741d638842f9e472ace
font_02_sfnt_off00014fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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