Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2c161443a44b19…

MALICIOUS

PDF

78.5 KB Created: 2021-04-06 16:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d4bb76634e82e4dc5aff8cddfcde1dd8 SHA-1: 98ef17c226c27eb2f8856daad0fa6f98cac4d828 SHA-256: 0d2c161443a44b1982239a5e779cdb8eead5c3cfe895f7929643f00856088f1b
156 Risk Score

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 0.9998

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://dugedepap.ru/strik?utm_term=how+to+clean+a+winchester+model+74 PDF link annotation
    • http://zerudomafiko.iblogger.org/11955357902.pdfIn PDF document text
    • http://kuxupit.22web.org/83269979990.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/1000_and_1_nights_summary.pdfIn PDF document text
    • https://bunexomuxupekir.weebly.com/uploads/1/3/5/3/135316193/xasoperoxapon.pdfIn PDF document text
    • https://kowijifeno.weebly.com/uploads/1/3/5/3/135390944/b7a245cbb448bff.pdfIn PDF document text
    • http://lawobulobatidu.22web.org/nausea_jean_paul_sartre_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://popofisofol.myartsonline.com/research_methods_in_practice_strategies_for_description_and_causation_2nd_ed.pdfIn PDF document text
    • http://nifiloxoburufi.rf.gd/before_you_start_your_day_piano_sheet_music.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_480962ef728e44eb86dccf715079541b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/semomuvemufamiwazuwadugo.pdfIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_1b74bccbdc894ddabc78b207530000be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/44283960796.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_3a7bfc32c6ae4c418681220cb763d4b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/37568047214.pdfIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_a68e1cd919544d8996e99f13d3765fc7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/zuwudifofiligefo.pdfIn PDF document text
    • https://7c3a386c-9197-44ff-a2a0-26a6be1b6260.filesusr.com/ugd/bba797_e294bad3030c47d08e2ae619f58dc707.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 5400 bytes
SHA-256: 26dfc66ed5dbc95802a0c49544b81c002d81b9487ac0262538d62c60d16eb083
font_01_sfnt_off000105ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AD 11524 bytes
SHA-256: 0fd4fb8358fc99a2547f88299127b034c028fb906393f444398385c6a5419e91

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