Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bb68444b0441b6…

MALICIOUS

PDF

74.6 KB Created: 2021-02-06 14:23:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f76314b268289558100f61d85e4105dd SHA-1: 46b0b3875366b717fe764b247eeb4fb1c26ad381 SHA-256: 08bb68444b0441b69365b0b561919a3a4472c9493e7de90510672971190471c5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely designed to redirect users to malicious sites or for SEO manipulation. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a phishing or redirection attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://druttle.ru/123?utm_term=multi+user+operating+system+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427781/normal_600905ab55687.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxumisi/mgjjgmI/4_ardrossan_loop_kingsley.pdfIn PDF document text
    • https://vazoxavaver.weebly.com/uploads/1/3/4/8/134863882/nubufodufa.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/1595286.pdfIn PDF document text
    • https://foworagajiwodim.weebly.com/uploads/1/3/0/9/130969946/vaxezi.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
    • http://tofezininas.rf.gd/large_polarizer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/integer_number_line_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/barcelona_city_guide_map.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/zevurarajemedepebuza.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/51418760361.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/trao_falciforme_e_altitude.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/52810741621.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/gcse_english_language_paper_1_model_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB4 5348 bytes
SHA-256: 181099543a4e9d48e0f05eba3b4f438f7ae3b5b0aa3413b48d4a9c2d78dc512c
font_01_sfnt_off0000ecd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 10064 bytes
SHA-256: b25ddfe33bdfc01d807cfeb5bbdc615387219fea2031f79d75f5d915487d542a
font_02_sfnt_off00010f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F47 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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