Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddb5a5dc3eee8ac…

MALICIOUS

PDF

76.0 KB Created: 2020-12-21 03:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c4cc570cc4af00586616c3a7040cd07d SHA-1: 24713862758e494e612d4456927a74c1a30b320d SHA-256: 1ddb5a5dc3eee8acfdfe9fd7c55083f9cfd2f4a6747c873c74456baa985c9ec4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'https://ggtraff.ru/aws?utm_term=marvel+jarvis+app+for+android'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign but serve to obscure the malicious one. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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
  • 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/aws?utm_term=marvel+jarvis+app+for+android In PDF document text
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/rufixupijabakod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fde8bd64ad8390d8b778f30/t/5fdee204fb7de13a6464a945/1608442374080/86872612634.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/amended_constitution_of_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/10821012094.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf64692dd96f5918e6dd33/1606378601567/cast_iron_cauldron_small.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/division_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/google_translate_english_to_bengali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879edd7c-2569-439a-bb1e-1cce9678f630/bbg_workout_planner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1919971-5b14-4b38-836c-215b225b8293/baby_bumblebee_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e28e6f-ed0b-4d9e-81dd-165e54108381/43699324544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedc3b17-9ab3-4fbc-9127-9ebb0d68f50b/tuwovovolobogega.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/jasperreports_fonts_maven_dependency.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2af6731-f943-4266-9d58-873245c746ee/prime_and_composite_numbers_chart_1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD6 5176 bytes
SHA-256: adb6c1a7b1f01635f02240fbdf0efa19124288d929bc6813801a780c7a689867
font_01_sfnt_off0000de8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8C 1864 bytes
SHA-256: ff8632102301dec17d5e0f4db7d72893da21054d5dfbb15c7961142ba27b9f16
font_02_sfnt_off0000e76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 10808 bytes
SHA-256: 1b09312fe9afa12457e66756eeda57c862fd2172947bcc7a09685bfe1e4467fe
font_03_sfnt_off00010ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA2 16292 bytes
SHA-256: 48764e87c02b9a84c146af116970153065bad6898a334da5007f310d7729f136

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