Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fbb25d8891227c…

MALICIOUS

PDF

75.7 KB Created: 2021-01-06 21:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 209de0c1aadbc7b4ccda2289abf1ce16 SHA-1: bf5fa5f0b9e5ca57819713af0277002b8b1a7602 SHA-256: 63fbb25d8891227c09027f6f1ff6a79466e43d53d7f31e9a573e57ef1f8ea71e
244 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to malicious content. The heuristic firings indicate the PDF links to known malicious redirector infrastructure and is classified as a phishing trojan by ClamAV. The embedded URLs suggest an attempt to lure users to potentially harmful sites, likely for credential harvesting or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=cycles+of+matter+3.+4+answer+key In PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/zevafamivenosefafe.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/bkqggje/92453820044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_5f8d68850f7b5.pdfIn PDF document text
    • https://bowutemol.weebly.com/uploads/1/3/4/2/134234741/3795849.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/dPfgiwP/clavinova_cvp_809_price.pdfIn PDF document text
    • https://cdn.sqhk.co/dapubebireba/dGdJJjj/limuniliwawetorefubigaba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503524/normal_5ff497f319ee9.pdfIn PDF document text
    • https://rigawolazi.weebly.com/uploads/1/3/4/7/134710531/196249.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/88eb2ed.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/gizigji/superseries_aaa_elite_hockey_tournaments.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_5faac3e8f17d6.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/womirofop/broken_hearted_girl_by_beyonce_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/lofojijukofetenol.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_off0000dbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAF 5332 bytes
SHA-256: 07e37107d672e24b775c3dbb63c356a114de32a125554f98e6fb807c3004b42e
font_01_sfnt_off0000edd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD5 11164 bytes
SHA-256: a107c609dd1e69db075e6f8146cc681b9f0fd924567a9ddaf5680979ae6c42c3
font_02_sfnt_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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