Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b07cc30c8325d93…

MALICIOUS

PDF

60.8 KB Created: 2020-11-19 22:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: aab14f223885a40a59ab365dd085b116 SHA-1: 72bfe19dbb6155027fdadf818f88e99684a49c34 SHA-256: 0b07cc30c8325d935c5eff4e47b3e602d475ed612ad787200d777a46c61e78fa
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URLs, 'https://traffset.ru/strik?utm_term=acordes+agua+marfil', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure suggests an attempt to drive traffic 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
  • 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://traffset.ru/strik?utm_term=acordes+agua+marfil PDF link annotation
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/tokuw_rijigig.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/gozifep/asi_se_dice_2_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/aadhar_card_by_update_request_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c8a750-0a43-457f-a501-168842085ea2/sansa_clip_plus_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/audiovisual_translation_dubbing_chaume.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/education_board_result_2017_ssc_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/anteaters_guide_to_writing_and_rhetoric_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/4386845845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ccda97-eee9-4fcb-b0d1-400bf9ee26e9/regapadefag.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/nisubakebuji.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/county_of_los_angeles_bos_agenda.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/yahoo_messenger_android_2._2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/faxuxafokedaselixar.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1DB 5328 bytes
SHA-256: 1995212356c05a4d5c72a56036b238a4397e8ec742ad4296231fd6075699f590
font_01_sfnt_off0000c3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E4 10020 bytes
SHA-256: 0f47b60b78e14e7226ef101cf53309640d879ea7383681bed0f78d58dc71744b

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