Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade03e0f421b1ea0…

MALICIOUS

PDF

75.3 KB Created: 2021-05-15 11:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 241b8fd59b67269fad235676079752b7 SHA-1: 175949f20bd9e87f7986c656cf8ddda687122d11 SHA-256: ade03e0f421b1ea0f6537a7dd8e07702c53c9b8af45913da14943e6e603b7e94
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 large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to drive traffic or distribute further malware. The primary malicious URL identified is https://xajibur.ru/strik?utm_term=funny+baby+goat+memes, which is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=funny+baby+goat+memes PDF link annotation
    • https://bevarepovorumi.weebly.com/uploads/1/3/2/3/132303359/bewevisovozuda.pdfIn PDF document text
    • https://medefali.weebly.com/uploads/1/3/4/0/134012737/3574181.pdfIn PDF document text
    • http://tevfikyuce.xyz/63276156617kui0i.pdfIn PDF document text
    • http://pearhaidhr.fun/geometric_mean_word_problems_worksheet8fihr.pdfIn PDF document text
    • http://domivenujivo.22web.org/zozilobididogozugedaji.pdfIn PDF document text
    • https://rijevolokawuja.weebly.com/uploads/1/3/4/6/134661742/zomoroled.pdfIn PDF document text
    • https://dopizuledukure.weebly.com/uploads/1/3/2/3/132302960/297215.pdfIn PDF document text
    • https://dibigisilob.weebly.com/uploads/1/3/1/6/131607467/xivadodapane_rovubidoxokesid.pdfIn PDF document text
    • http://buytoday.cc/how_to_replace_seat_cover_on_club_car_precedentbpyfw.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/b6920807-9507-4787-8bd8-c33455221d95/45742040304.pdfIn PDF document text
    • http://gajopem.epizy.com/speaking_activity_games.pdfIn PDF document text
    • http://jinoremer.rf.gd/pituzafibenulidetiranave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f739c7e-7953-4607-8fb4-731ddcfe9a45/folajanebetax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0bd077-029f-4806-8174-54f3359dcfa4/abb_power_transformer_manual.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_0aaf8f49e4834ee18ebf0a66791b077e.pdf?index=trueIn PDF document text
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_51d56e5083964ecbab52be97d65a5254.pdf?index=trueIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_fe1b7677f2f2483991f3b53321c082b8.pdf?index=trueIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_e6201228aaf740cd89c7574d0050a3eb.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_a78a4dc43070430ebe314a7e47f259fb.pdf?index=trueIn PDF document text
    • http://jopajenazub.epizy.com/economically_weaker_section_certificate_download.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_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 5076 bytes
SHA-256: c38e05e461e145ce95757eafbaff7069bcdfdc685c0c36da75e3c88dd678bcd4
font_01_sfnt_off0000fd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD26 10336 bytes
SHA-256: ebd403bc7832de93e59111aa27530a63834a36e555005219f25f8a1aa4634137