Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff3b3f6f92fefd7…

MALICIOUS

PDF

74.6 KB Created: 2021-04-03 04:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c0665cb018324515dfeecdfcea77490e SHA-1: db6d99bd1505f2d83d3e6fca2eeab0dd16d55944 SHA-256: bff3b3f6f92fefd737e9f2d3fff395deb3af0dfa47fc6b6af7577b7b4077d7f0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://gimoguvi.ru/strik?utm_term=life+application+study+bible+new+living+translation+tyndale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455376/normal_6004978b347de.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/willy_wonka_and_the_chocolate_factory_characters_wiki.pdfIn PDF document text
    • http://bestgirl69.com/ninovujot09oym.pdfIn PDF document text
    • http://antileqphh.site/how_to_rig_a_fishing_pole_for_troutaoycq.pdfIn PDF document text
    • http://pokypka.xyz/gexizitodokisawupegup0phky.pdfIn PDF document text
    • http://samelike.site/ibm_bpm_8._6_installation_guidezhf2f.pdfIn PDF document text
    • http://gazozaxuk.getenjoyment.net/difference_between_balance_of_trade_and_balance_of_payment.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/6a50deb7-2cc2-45a2-bca4-287f7b4ebbf7/45932776082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581aaa04-dd79-4867-9d70-0786df0eaf97/volume_of_cone_real_world_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d0b205-71f9-4f8b-a442-49af481754d8/diziwakageru.pdfIn PDF document text
    • http://roxujewov.myartsonline.com/aileron_control_reversal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1573b106-4466-4385-b48c-a797fd3b399d/what_year_is_my_clark_forklift.pdfIn PDF document text
    • http://gafodix.myartsonline.com/49730462521.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_58575d1f23e64f9586e7e1bb439902cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5273150f-b92a-4cfe-a0be-aeaa784f79b0/dometic_brisk_air_2_thermostat_wiring_diagram.pdfIn PDF document text
    • http://laxukumelukadut.myartsonline.com/62219421179.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF57 5656 bytes
SHA-256: 1a72def962038363e3f13079950b3d8ef08c7cadbec775e477e2a891831ee0e0
font_01_sfnt_off0000e2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CE 10656 bytes
SHA-256: 1af31c86c1d29e5d9279eb5d17504490f587132a841babaf680a5c5ea31cbb04
font_02_sfnt_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 16064 bytes
SHA-256: 2bad467a3639e7270d00e4d92b62c633bdf3fca121352097ea953ab0934ed0fd

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