Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee2cd692a2dab8c…

MALICIOUS

PDF

79.9 KB Created: 2021-03-17 07:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8f51d6117096b596b5f281c40892d14b SHA-1: 61b7f26ce4a55400d1782a23e1674774760542dd SHA-256: 6ee2cd692a2dab8c434b2a9d698d8aeb315c131ba1c8878c2e4e5aaae2cf69ab
244 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/wix?keyword=simple+er+diagram+for+hotel+management+system In PDF document text
    • http://tovelksa.website/on_my_way_brother_bear_piano2r288.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/XxhihhY/blue_light_glasses_mens_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/lgejahb/32811808116.pdfIn PDF document text
    • http://igcopyrightforhelps.com/vishnu_sahasranamam_in_gujarati_textbi1uk.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/7hfOijL/swamp_dogg_total_destruction_to_your_mind_lp.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/WigggNg/samsung_calculator_apk.pdfIn PDF document text
    • https://pegutezupo.weebly.com/uploads/1/3/2/7/132740329/5301038.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/ggjhjco/pupps_pregnancy_rash_on_face.pdfIn PDF document text
    • http://skidki-day.site/auto_call_recorder_apk_uptodowndd5qi.pdfIn PDF document text
    • https://cdn.sqhk.co/kinerufi/vgiiahe/happy_birthday_sheetal_cake.pdfIn PDF document text
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/lezowetobisop_silixinolasewe.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxifobiro/jmxhbhb/58325640843.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/gfmCiiZ/22714769754.pdfIn PDF document text
    • https://cdn.sqhk.co/mubogasaven/iihggVV/betawipajasuxexi.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/paferixagefoza8ekth.pdfIn PDF document text
    • http://pe50off.info/dugigafobuvugodezufimuta2dgl.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/ifyjgjb/cowboy_caviar_with_corn_and_rotel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_7f3b309613c44107b8d6fe97d9850a5e.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_b33828cd27164367890c7e314fc6ad85.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_off0000fd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD96 5660 bytes
SHA-256: d192a2652932d94954e9a734e6f47e9a96176b67f811ffe4876899247962e203
font_01_sfnt_off000110ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AD 9832 bytes
SHA-256: 11854bdc9ef01c3dc24685630993d88567ad80cbc905b0abcf1206d8fe19730b

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