Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a97097a132ee08f…

MALICIOUS

PDF

79.5 KB Created: 2021-03-03 04:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fe0ef4588dc60bee5291037f140260cb SHA-1: da66a8e16583ec2f80b51da4da999c2eec10d8c7 SHA-256: 9a97097a132ee08fbfe632a268afbf47b4ee41076779ceea9863634eb0377879
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=what+is+the+lightest+ar+15+handguard PDF link annotation
    • http://wovuwukotuvoxi.mygamesonline.org/70177873158.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/jarobuzuwetebur_wonekugi.pdfIn PDF document text
    • https://fipekonekuz.weebly.com/uploads/1/3/4/7/134742334/tirosoxugozuxeda.pdfIn PDF document text
    • http://thesimplycompleteseries.com/13057619614pt9ss.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/little_house_on_the_prairie_season_2_episode_7_part_2.pdfIn PDF document text
    • http://biomanua.website/69631111782nmpr7.pdfIn PDF document text
    • http://meetsoda.pro/wotujodnl4xu.pdfIn PDF document text
    • http://fenellalucynelle.info/amity_university_lucknow_formmi3qh.pdfIn PDF document text
    • https://sedozexejelem.weebly.com/uploads/1/3/1/8/131871533/nosekunukeje-jikak-duxijijaz-denuvepepaf.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/nisoxow/catherine_wheel_chrome.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/87687200504.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/16113651552.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/visiting_card_illustrator_template.pdfIn PDF document text
    • http://gezixus.myartsonline.com/libro_por_el_placer_de_vivir_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/stm_cortex_m4_datasheet.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_off0000dc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC20 5276 bytes
SHA-256: 96d5fef6d9ff9bac8efe4ca58f3ca69663eebfb3a1b200047d4602f25c25c19c
font_01_sfnt_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A3 10568 bytes
SHA-256: 89701a412579143654e4f7eba1af06df060771f61e3879192cbb46a0132d90e2
font_03_sfnt_off00011ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC5 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b

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