Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c37c89d1de7baf…

MALICIOUS

PDF

66.9 KB Created: 2021-03-12 06:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 96f81286f7b8d167f5f7605b92677f9b SHA-1: 998c3fd602e9f197df3f3e6785c043a394778aa6 SHA-256: 69c37c89d1de7baf74ca7ea3147824478efcb087e90d546fce4f7a802d7100de
186 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. 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-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.
  • 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://ponafet.ru/award?keyword=fungal+disease+in+plants+pdf PDF link annotation
    • https://cdn.sqhk.co/sekigizakeku/Dhikig8/cubes_empire_champion_mod_apk.pdfIn PDF document text
    • http://ibkreactiva2020.com/why_does_my_dishwasher_have_no_water_pressure775fj.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/iMHjjhi/star_traders_frontiers_mod_money_apk.pdfIn PDF document text
    • http://wodaretibinusad.22web.org/52570681686.pdfIn PDF document text
    • https://cdn.sqhk.co/mekoposa/cjdjhYV/visewika.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/jhcYibh/rodomupasuginelirerejiget.pdfIn PDF document text
    • http://lynciguest.com/how_to_change_safety_first_thermometer_back_to_fahrenheit4rcsv.pdfIn PDF document text
    • http://rocketdocs.us/space_armor_2_mod_apk_android_12aclv.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/iamjg47/new_house_party_gift_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/2jhMXyh/vip_guardian_pp_4w_strolly_65.pdfIn PDF document text
    • https://cdn.sqhk.co/xozifejor/ghihgic/1859222675.pdfIn PDF document text
    • http://rijupoxog.22web.org/arduino_tutorials_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/EkJWhff/south_australia_national_parks_and_wildlife_act.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sezujilusevone.epizy.com/fanowogejirafolulosidis.pdfIn PDF document text
    • http://pulawev.epizy.com/what_is_the_process_of_booking_in_jail.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_8939acff5c1d4c6384fa4aaaadbb1913.pdf?index=trueIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_54a30d023ae346fb8aac8798a187d452.pdf?index=trueIn PDF document text
    • http://moxanasaki.rf.gd/advanced_mvc_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • http://pomuvoxibi.epizy.com/how_to_memorize_the_phases_of_the_moon.pdfIn PDF document text
    • http://kisezemewarajox.rf.gd/94436228935.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_off0000cbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC6 5068 bytes
SHA-256: d27e4b2e43fc4c2efaf96f61d66d2f2f25b91af16d4ba4788cf4b59618cda273
font_01_sfnt_off0000dd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 9656 bytes
SHA-256: 4a3279a1de2fbeab584179fceb2918298aa55c7c5be2cf083649a846924ea902

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