Malicious PDF — malware analysis report

Static analysis result for SHA-256 97612da4b8631fd5…

MALICIOUS

PDF

100.8 KB Created: 2021-03-21 01:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 48410df9bd82887e243a96fcbe02cf82 SHA-1: b9765e5bacdcfe8f74064ca701e70fe45adcf2d3 SHA-256: 97612da4b8631fd577296fc054f6c4404cd458335020fb38b8d470bbb92aec7a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://crophysi.ru/strik?utm_term=jump+force+characters+wiki PDF link annotation
    • https://cdn.sqhk.co/jemitaso/ihbxgcN/prison_break_season_5_episode_20.pdfIn PDF document text
    • http://ouily.xyz/radorazusisigidedb3ffs.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/hwQTijc/98901129685.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/DXjbCAs/peruwidugituboluvevujasuw.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/why_did_hugo_weaving_hates_red_skull5l8cj.pdfIn PDF document text
    • http://magic-spring.com/nodelawazileqdhmr.pdfIn PDF document text
    • http://zahlungsservice-ch.site/58126030285fk055.pdfIn PDF document text
    • http://vorecan.fun/complexometric_titration_experiment_reportv9qtp.pdfIn PDF document text
    • http://marafonsport.site/69128709910xwlq4.pdfIn PDF document text
    • http://znasila.ru/ilpa_guidelines_lpaoryf1.pdfIn PDF document text
    • http://7lessons.space/vizoxolatibopiren2uql0.pdfIn PDF document text
    • http://youla-24.cc/zuzekijirazojuss9g.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/8203673786524625.pdfIn PDF document text
    • http://boomua.site/percy_jackson_and_the_sea_of_monsters_audiobook_chapter_7rlvqc.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/ujiQhfu/is_amazon_music_unlimited_included_with_prime_canada.pdfIn PDF document text
    • http://1offpark.xyz/ashraful_hidaya_part_240dop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7adcbb-dc68-4ab3-8ded-7f6ac072492f/samsung_rf4287hars_filter_change.pdfIn PDF document text
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_c048489217904cbe8bfe7e9e8f468eec.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_36a9edc4f0a143a3ab630f32cb06b101.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d515fc-32db-4027-82ed-17075463580a/free_printable_easy_crossword_puzzles_for_seniors.pdfIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_a21ee4fa69cf46798b9ee6f95b284643.pdf?index=trueIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_6d8c2c5b2f524f4f9f9d892629b9453b.pdf?index=trueIn PDF document text
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_0126bbea8c524cbd968bbfca6ed21091.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc7f039-33b1-4072-9c8e-fb36f826bea2/4597752487.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_off0001361a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361A 6356 bytes
SHA-256: fba1a4bbfe2299b500093ae5596cc462570cd830483b221d5d0b9d061ae361a6
font_01_sfnt_off00014b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B25 5368 bytes
SHA-256: ed92b1473caff0d17a95adef4b2ab47fc57648351150ccf9f357c55d86f0f9c1
font_02_sfnt_off00015d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D51 12596 bytes
SHA-256: ec052ba863459503a96f65ba9b4bb237395e9cfa1aeb82ccc9ef805c70c121b0