Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec9c084b10fc29d…

MALICIOUS

PDF

75.0 KB Created: 2021-01-02 05:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4767a5ce7a168fbd0e4f97355ec62e5c SHA-1: 57fd0b496ec826daa35b6723fbfe30afe4de788b SHA-256: 0ec9c084b10fc29d5ef91b0eb60354fcdb7bfcdda473800b4871d16754a48bb2
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a book summary, likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/wb?keyword=hachiko%20book%20summary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f9e092caae4c.pdfIn PDF document text
    • https://datevapo.weebly.com/uploads/1/3/4/3/134338939/4988651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_5fc1b95c809fb.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/pajukovuxetu/nawomewonisinesatu.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/xukalirewemejo.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/economy_of_the_mesopotamian_civilization.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/fepopedumegogazuzapodof.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/brabantia_bin_liners_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/redigamutekoxozixojefovo.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/huawei_sun2000-_8ktl_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tifemuma/maduguwaxaxafe.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_off0000dcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 4852 bytes
SHA-256: e06d26b2bc63adfb2cbc144e70d7cb2ef8875430965e6e8582e1c39d4921681b
font_01_sfnt_off0000ed65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED65 10504 bytes
SHA-256: 340797a533e9b1bcead1b61c413ced958a64b8d295539516e7d2092287901db7
font_02_sfnt_off00011116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.