Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcc0d113bf682eb…

MALICIOUS

PDF

76.3 KB Created: 2021-03-29 11:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e106f2dba7a50c538a2749637a932e5f SHA-1: 042c023b580a1092736c8a4752ab9916a5da1bd3 SHA-256: abcc0d113bf682eb8e5a62aa1ac0a9bb929e9c44e9203a93bf63691f7e54492e
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the presence of external URLs and the overall structure point towards a malicious document designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/strik?utm_term=what+do+i+need+to+record+my+own+music PDF link annotation
    • http://vowuzemiru.medianewsonline.com/vaikom_muhammad_basheer_short_stories_in_malayalam.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/ar_15_double_magazine_connector.pdfIn PDF document text
    • http://razvivatel.blog/bevudusugutikiz75y5v.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/ggjchhe/drum_sets_for_sale_near_me.pdfIn PDF document text
    • http://shopsupergood.site/python_basics_interview_questionsv7dq2.pdfIn PDF document text
    • https://cdn.sqhk.co/dabekojov/Gfifhcu/baixar_arquivo_para_android.pdfIn PDF document text
    • http://salet.store/4568335403489em2.pdfIn PDF document text
    • https://cdn.sqhk.co/wosinuwukabu/ihjTgeB/strong_leadership_skills_interview_questions.pdfIn PDF document text
    • http://allfreebets.ru/6981698773l8tt0.pdfIn PDF document text
    • http://workbykoder.xyz/pomiguriropanisumovijamorqckrl.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/ivjczhd/gz_motorsports_pump.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/zlvo7ij/anime_live_wallpaper_mod_apk_3._3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_23539027740f4239b485542b8858d623.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/social_security_administration_employment_history_report.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_7a79023ddff2472290261b426c2ada08.pdf?index=trueIn PDF document text
    • http://vilepobafomunow.atwebpages.com/tabupofimoradavereto.pdfIn PDF document text
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_f9f8191d52ad4e5b8ee4bc3c67bc2032.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/the_last_of_us_ii_trailer_song.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_49e2a0122ae04ecb9d163d3baba4088f.pdf?index=trueIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_9c2937c370bb4827ac521e20a63253a0.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_c1ded3bbfe0f487096d7e8b407cba358.pdf?index=trueIn PDF document text
    • https://65fca3b3-7ce8-4d56-9bc8-ebe46cc5223b.filesusr.com/ugd/f6ed72_ff1d3941a99648659dbec1741ef110f0.pdf?index=trueIn PDF document text
    • https://76c87692-cca9-4651-be8e-de6412dad411.filesusr.com/ugd/fdad67_79fadced0e6b4b89a2f934d611a664cf.pdf?index=trueIn 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_off0000eb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7E 5352 bytes
SHA-256: ab6168e456a1f032e9f87c766b0f87ca0ebe0ef93cfba045036e8a21ff16ead4
font_01_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 11088 bytes
SHA-256: c057ebd5eb2a7de97d30ffa9e9f7dc9b212a66a27802ca8664335b5d60435cc6