Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18c97d946c4f0fe…

MALICIOUS

PDF

91.5 KB Created: 2021-02-18 15:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 28a5a0da86192d7174a31ee7b63c0d18 SHA-1: 1bc107e261271361babf700efd96d0bc37619428 SHA-256: f18c97d946c4f0fea8b5a0323fda3b8ab4033eb4e6900a5499f633ca94e911b2
186 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, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=jbl+xtreme+2+speaker+specs PDF link annotation
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/8934ed7.pdfIn PDF document text
    • https://pugulewex.weebly.com/uploads/1/3/1/4/131406013/tatasuwigifulij_watunexukapeviz.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/gjdphis/xuvijudapili.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/e1e2c180.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/botiramowunite.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/294926748561tmvo.pdfIn PDF document text
    • http://tk-pobeda.site/business_correspondence_and_report_writing_free_downloadtvk4d.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/jh1gcid/72530024167.pdfIn PDF document text
    • http://fallofelin.online/90307085623sqji7.pdfIn PDF document text
    • http://ecoservice-vlad.ru/river_road_animal_hospital_niskayuna_nykqxqq.pdfIn PDF document text
    • https://vumopofusub.weebly.com/uploads/1/3/0/8/130874587/turakux-xaxofijokoxevu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5ff6b9da2a948.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://s3.amazonaws.com/gasodamuza/bibele_ye_kenile.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/91359349433.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/definition_of_business_economics.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001073d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073D 4996 bytes
SHA-256: 96b2138ff981ce4242a4adca4ac6a1a6aed104dc480e515891f7524a7109a8b0
font_01_sfnt_off00011838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11838 10828 bytes
SHA-256: add430c543c35d03c51c3a69b2ac622350f1cfd4fb42c6faca1fef27d630a210
font_02_sfnt_off00013d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D4F 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c
font_03_sfnt_off0001524b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1524B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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