Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ab9b6c271f8721…

MALICIOUS

PDF

79.1 KB Created: 2021-02-18 06:10:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1eb1dccd2314fbc4eaa6067ad1bcd8b2 SHA-1: c15c7987200425704afe7604751e2fd90326c7e6 SHA-256: f3ab9b6c271f8721189a2d42045f903bac906e3933fda75db9f3fc8c4a710bce
214 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded links, many of which point to known malicious redirectors or link farms designed to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://crophysi.ru/strik?utm_term=can+you+use+fender+fuse+on+ipad In PDF document text
    • https://cdn.sqhk.co/jefigujaxev/jbNNVAy/sejejel.pdfIn PDF document text
    • https://zutizogemene.weebly.com/uploads/1/3/5/3/135348028/9732901.pdfIn PDF document text
    • https://cdn.sqhk.co/dudexobexine/cccp3ml/46032779528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455658/normal_5fe71037d8061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390069/normal_5fccc5f7de4f0.pdfIn PDF document text
    • https://nukogakulezov.weebly.com/uploads/1/3/1/3/131378840/dimoxi.pdfIn PDF document text
    • https://gemuvubakada.weebly.com/uploads/1/3/4/4/134494784/warabexen.pdfIn PDF document text
    • https://nimamadud.weebly.com/uploads/1/3/1/8/131856523/vazalapo.pdfIn PDF document text
    • https://tawisowa.weebly.com/uploads/1/3/5/3/135315305/7098336.pdfIn PDF document text
    • https://fosakozetabu.weebly.com/uploads/1/3/1/4/131483491/c5cfa955e96ea46.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/d37vkhi/24756729205.pdfIn PDF document text
    • https://cdn.sqhk.co/pepigovagove/hjj4Ygj/heron_bird_wingspan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vigevot/gcse_biology_revision_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/44214111143.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/attendant_console_standard_installation_guide.pdfIn PDF document text
    • http://tefotifomasun.epizy.com/reading_plus_level_j_story_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/anniyan_songs_kuttyweb.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/st_cathedral_church_goa_information_in_english.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_off0000d4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C9 5012 bytes
SHA-256: de32b9a02452c1400b5fcdfaeaaa60a4853c1665587311e21b16cb18aaeced15
font_01_sfnt_off0000e5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E4 3956 bytes
SHA-256: 2435cad86891725dfddb12127edf7d97ef38b5ff776060f3c8f1456a1506c22f
font_02_sfnt_off0000f0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B8 11932 bytes
SHA-256: 1057045bf4639d86f8d5398391776f6f944ea4263d6ce556633ba43bc6dd20c4
font_03_sfnt_off00011998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11998 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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