Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f112b41bc59a350…

MALICIOUS

PDF

86.1 KB Created: 2021-03-20 21:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 78adf1b4411b91b3bfe93031a23816fd SHA-1: fecd29a166b66cd4913a10238296aa78a57b46e4 SHA-256: 0f112b41bc59a35045d0a97c2094e5d62ec13005df7e2ae5d3c81c32b6b76989
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with several pointing to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting an attempt to obscure the true destination or purpose. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or malware delivery through the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://botokaw.ru/award?keyword=kirkpatrick+model+of+curriculum+evaluation+pdf PDF link annotation
    • https://cdn.sqhk.co/zeritogekuja/je5hjLR/rush_rally_3_ios_gameplay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_6028ba04eaed8.pdfIn PDF document text
    • http://runmasten.online/habit_7_sharpen_the_saw_activitiesa5njj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_604cd248f18e2.pdfIn PDF document text
    • http://storeeu.info/2006_ford_f250_super_duty_oil_change89prv.pdfIn PDF document text
    • http://triple-doska5.club/sonosebujasavijegowuvsz765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453328/normal_602b7c321df28.pdfIn PDF document text
    • http://tertov.xyz/vevexijafajusovumoxavizulxkef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451021/normal_5fde3cf717079.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/bhaKasJ/jebexupuwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485165/normal_5ff600832e2d4.pdfIn PDF document text
    • https://cdn.sqhk.co/dojiwazufek/big9MlX/92190393175.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/ggkaKgd/susufigorew.pdfIn PDF document text
    • https://cdn.sqhk.co/sunaxidida/yhi9uKv/coffee_shop_3d_model_free_download.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
    • https://uploads.strikinglycdn.com/files/bf256a36-3866-4835-83d7-f3e48c28b107/tatapowugakiniliw.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/45293397308.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_44dc72da65904793bdce287f7fa4913f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/software_licensing_agreement_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/how_to_check_codes_on_2006_jeep_grand_cherokee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb316211-a1a3-471c-9148-9b8be2468236/propaganda_edward_bernays_turkce.pdfIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_09d369ab8bbf42bfb9711c2cb7800efc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/32913167994.pdfIn PDF document text
    • https://0b670cc3-d94b-4117-8b98-7ce677fb6c21.filesusr.com/ugd/7bc559_31855d789a5942aca547cc7b2615ed1b.pdf?index=trueIn PDF document text
    • https://69b12d55-863e-458e-a545-ad358ed6bd1a.filesusr.com/ugd/a9642c_16d17b301254449084b455462cf1c421.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00988080-a53b-4b36-a652-5f5fa1778704/why_are_gypsy_moths_bad_this_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84853aa-6076-4e27-8ac0-03e7ca6cd853/star_trek_enterprise_archer_und_tpol.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 5096 bytes
SHA-256: fbd406dd2352ed241711089e9c8799365c17b05ac337a262912e351ad22ab28f
font_01_sfnt_off0000ff7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 10876 bytes
SHA-256: 0b928e51bf17dd9fec224b0021ecbb0c4876770df7d3f394a09a6ae8c8432dee
font_02_sfnt_off000124dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DC 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00013a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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