Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc08538d8d5abc5…

MALICIOUS

PDF

82.6 KB Created: 2020-12-02 18:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 66b2c2c0eed38421bd66e6e735825bf4 SHA-1: 1c7753437957c35416b5de920d4d3dfd6353394a SHA-256: 5bc08538d8d5abc519f8ae2586fd0e04e01b2d1034fe3e2161babec8f1c771c4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffnew.ru/aws?utm_term=android+jetpack+data+binding+example PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402949/normal_5f9738c79fd87.pdfIn PDF document text
    • https://xexogabowagub.weebly.com/uploads/1/3/4/4/134438270/5b5c00b41a7577.pdfIn PDF document text
    • https://baminivosawu.weebly.com/uploads/1/3/4/7/134701136/giwawa.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/miwolezedubujoz/29313888409.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/dragoneer_s_aria_walkthrough_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c2c428-510c-4e01-82fc-674a92952fca/jackson_fire_department_wisconsin.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/dijipugimofivelorok.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/periodic_table_class_10_notes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11355ab79f442f22aa123/t/5fc6493d2dd96f5918c2cf11/1606830398779/doom_slayer_vs_master_chief_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/makkar_ielts_speaking_september_to_december_2018_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/christian_audio_free.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/ladagoradiwuda.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_off0000f59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 5340 bytes
SHA-256: feb067c4cddea5a9bb3cd39325a74de51e509f3efad104301215c73bac6bcc95
font_01_sfnt_off000107ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AE 11560 bytes
SHA-256: 75bfb3346630baecb56c7e69d8a7ab4cd69c1ff0bb169f82ef3bccd01d6560c1
font_02_sfnt_off00012f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F55 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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