Malicious PDF — malware analysis report

Static analysis result for SHA-256 3797a69f5df79aae…

MALICIOUS

PDF

81.0 KB Created: 2021-04-17 06:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1434a7282004da238220314acea744a1 SHA-1: 0d965fc04ee67626b42c48ab480445dd170b2cad SHA-256: 3797a69f5df79aae5de2638e8d7f38114830ebcb84fc2b3bab828e3cab8e2820
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://vilenefex.ru/strik?utm_term=how+to+use+novation+launchkey+with+ableton', are likely part of this scheme to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://vilenefex.ru/strik?utm_term=how+to+use+novation+launchkey+with+ableton PDF link annotation
    • https://dopotixoniwatom.weebly.com/uploads/1/3/1/0/131070918/591380.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/wghghig/women_s_soccer_football_kick.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/jihbEgc/rajouri_garden_market_directions.pdfIn PDF document text
    • https://cdn.sqhk.co/kevejonob/ahiib6J/chaahat_movie_hd_free.pdfIn PDF document text
    • http://afracheat6.xyz/what_is_the_rainy_season_in_costa_rica09pkd.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/dCgdigs/malayalam_album_songs_saleem_kodathoor_audio.pdfIn PDF document text
    • http://tibetterrier.ru/mycobacterium_tuberculosis_acid_fast_stain9697r.pdfIn PDF document text
    • https://cdn.sqhk.co/biziduwime/f96Eig0/jemuxapavalekeponuluj.pdfIn PDF document text
    • https://xorataseturife.weebly.com/uploads/1/3/5/3/135333409/3439251.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/Dji1jiO/75757089787.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/bbFhdih/warframe_defense_mission_no_damage.pdfIn PDF document text
    • https://milanesove.weebly.com/uploads/1/3/1/3/131383497/lepukiwudixukamijax.pdfIn PDF document text
    • http://afracheat2.xyz/movisimawilonazafukj8jh8.pdfIn PDF document text
    • http://lorenbayi.com/pepujazn9hf.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/UghFcjg/mipimefuguzexufafab.pdfIn PDF document text
    • http://adv-workshop.site/8841993368336t01.pdfIn PDF document text
    • https://cdn.sqhk.co/virapazetif/AQhiDhi/gluten_free_banana_monkey_bars.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/db5bddbb-3f0a-4deb-8d78-cdb92e2c4325/14028777546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9031d18-6df5-4619-962d-19e6e5c54748/rivoguxav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b287955f-5112-4212-bd3c-463dc8cd0ef8/what_characterizes_godly_discontent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b214fc23-4dcd-4cfe-8f87-f79f27690209/mr._coffee_12-cup_coffee_maker_with_thermal_carafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547d8dd0-fed3-4f9c-9183-f374330b5b78/zavalipagujaxenujulumaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4835a285-1be4-494b-9cf2-fd47f0fd7196/jason_and_the_argonauts_greek_mythology_story.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 5092 bytes
SHA-256: 5085cc154599cc7e988315db0357f69461eb9beb3fe19b578d3755ad508466d8
font_01_sfnt_off00010260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10260 11140 bytes
SHA-256: add131c1eda3f684c1e5804408bb1dba1b42c5fe1b14b7a164add952f66a1494
font_02_sfnt_off0001281e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378