Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b675e5b8033643…

MALICIOUS

PDF

79.4 KB Created: 2021-05-15 11:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3b3bca1ed1f6725b92b4af254389b3e4 SHA-1: 524a969bf39cee2bc7a96e7b0047957aeca9e889 SHA-256: 32b675e5b8033643cd16f9b69416436f0ab49fc382f56e2097393dbf1751ff0f
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 0.9964

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://nipisod.ru/strik?utm_term=how+to+thread+emerald+116 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408878/normal_604d6f12e3cec.pdfIn PDF document text
    • http://xomuxurek.22web.org/20918623015.pdfIn PDF document text
    • https://cdn.sqhk.co/wiparodub/hfsoBjb/greatest_hits_radio_cash_superstars_competition.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/WhkeieB/60554297280.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/hg6icic/pomujogutopeter.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/gikdhcX/madasexowakuxuxugap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450244/normal_60097faa50788.pdfIn PDF document text
    • http://kilewigi.iblogger.org/rukotubotapaduduw.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/hhg28r2/nefekolafemesut.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/hfNs3qs/dhoom_machale_dhoom_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459914/normal_6063fde2506eb.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/j2Stjcf/dark_side_yoda_fanfiction.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501998/normal_6000c401505f9.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/gdjchhh/driving_probation_period.pdfIn PDF document text
    • http://katomowubi.iblogger.org/83848062809.pdfIn PDF document text
    • http://sikutamilom.iblogger.org/daily_thanthi_tamil_news_paper_today_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449183/normal_60380d6d86651.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/0f1c9062-60b7-46be-aeea-d773b2d3a31a/29529495434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/109329c0-ee7f-4ed1-a790-0f74b3585287/59469233232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a0ce63c-8a8d-4fce-977b-91c017fbed26/the_zookeepers_wife_summary_chapters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf1773b-1da9-4016-a6d3-6d52438d25b6/58613545878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a9a544-a0b3-49dc-a830-0698d964a215/xidamogufamerivotabinaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff108a9-9b6e-48a0-8d31-4beed63a6fb7/boy_scout_merit_badge_sash_pin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a57cbf3-015d-4c75-a548-368c32d42cb8/zaxikuzipokamogokol.pdfIn PDF document text
    • http://wasaxotudulolo.epizy.com/radical_acceptance_dbt_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9573ce66-035a-44d7-acc2-c56a7ea4ab21/wifufunutubafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6562387a-2a54-4a18-8f30-35b8eab584d6/washington_state_map_township_range_section.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec7dbdc-dbc4-4bbb-b07d-9dd6bfbfa90b/1120264923.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_off0000f552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF552 5144 bytes
SHA-256: c6152ce05a622e3e4cdf286701fa52ab19275d27133f92dd2e0d8d1746f0d384
font_01_sfnt_off000106b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B8 12980 bytes
SHA-256: a9994cbf07e76f4ade74bab11ab696666096c6576f6015fba509bbb4937df6cd