Malicious PDF — malware analysis report

Static analysis result for SHA-256 102ad5cb2edbcdd6…

MALICIOUS

PDF

65.0 KB Created: 2020-11-24 06:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7e284def61a67572cd32bad054380c4a SHA-1: d1257cc96534a32461652f2044ae4f0104d5b59b SHA-256: 102ad5cb2edbcdd692036df10f2ef834b6e452f5c42a1ab976e5d55b20312654
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign but likely serve to obscure the malicious one. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient to indicate a phishing or malware distribution attempt.

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
  • 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://ggtraff.ru/strik?utm_term=lettre+de+l%2527+alphabet+%25C3%25A0+imprimer In PDF document text
    • https://xaverawigidun.weebly.com/uploads/1/3/4/4/134437914/limikazujukanot.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/gogunabones/carotenoids_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/sidequest_templates_review.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/84249471748.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/dinasopodilodefibip.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/79541670685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe35f079-c05e-4893-a800-2b09d8006671/75191601948.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/al_quran_with_urdu_translation_and_tafseer_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b4a2615-c7ae-44ea-96c7-d8dcc36ba51f/panajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3212117f-3efe-40e2-9ffb-8520f468aad1/91527519532.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/pimefa.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/mdu_ba_final_exam_date_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/xalopidofulo.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/binasija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d73361c-b4ff-4353-9ac8-79d2b24520b0/operation_werewolf_chapters.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/dates_of_paris_fashion_week_2020.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_off0000beb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB3 5372 bytes
SHA-256: f03e51a5fac9de9fb87e1474265ea6ff7ae51b843723a180a82a5a51142c1acc
font_01_sfnt_off0000d040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD040 11672 bytes
SHA-256: 1582d9f0bf5fef7814e3bb85ff3138c7aa9cbc3e4e35395db218b11a637fee67

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