Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d55b968d6dca74c…

MALICIOUS

PDF

72.2 KB Created: 2021-03-06 06:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: beb2a770b54fe1374925c1712c2e625b SHA-1: b71438a814a56585dae9dbd1d7765f5ad4411aaf SHA-256: 2d55b968d6dca74c9a96418f70acc33248aeed938cd825f7d19441ea9234d150
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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/wix?keyword=john+deere+zero+turn+owners+manual PDF link annotation
    • https://nobaloledajasom.weebly.com/uploads/1/3/2/6/132681012/b14238eb728.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/4059954819.pdfIn PDF document text
    • https://jelakuge.weebly.com/uploads/1/3/1/8/131856802/dilivurumusa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486965/normal_60038b6ecc916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471686/normal_60186370b22a0.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/9hdKeia/street_fighter_iv_champion_edition_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/iiEoYhg/jugal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovufavon.rf.gd/69938832349.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/73753518250.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/66900266095.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/cen_tech_7_function_digital_multimeter_manual.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/excelsior_springs_community_center_trunk_or_treat.pdfIn PDF document text
    • http://filosoko.onlinewebshop.net/pifemiris.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/58945144196.pdfIn PDF document text
    • http://kokamusosimabo.rf.gd/kibawaxopolavapuvexomerat.pdfIn PDF document text
    • http://gesozep.rf.gd/alesis_sample_pad_pro_sd_card_format.pdfIn PDF document text
    • http://vadufitewaseru.epizy.com/barthes_death_of_the_author_summary.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD2 5196 bytes
SHA-256: 1a2d045bb456363547c3b3e6ead0cd670ddb222ac4735f1fa177ae1f034082b2
font_01_sfnt_off0000ef64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF64 10700 bytes
SHA-256: 3ad9b1bea563155659801efefa3359b98fa72009adc5e020ffc8e4cbd5dc6b17

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