Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f2eb9a5a125d0e…

MALICIOUS

PDF

38.5 KB Created: 2020-11-04 15:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e7c9e9655e3e79d5fc95f15dae827c76 SHA-1: dda4f71259d9c88f894e08a061188d268a35c8b4 SHA-256: e1f2eb9a5a125d0e0d63f6e363151f544b3947520147ee3ee1daa7daa5b4a9e2
94 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 an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.ru/123?keyword=ann+arbor+craigslist+cars+for+sale In PDF document text
    • https://gemiwanot.weebly.com/uploads/1/3/4/4/134495393/8837910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9665ccb-8134-4592-84b6-02e67848103a/nier_automata_leveln.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7b7f279-1280-4c1f-9b2f-183f3a91a282/60426921117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20203cea-beb0-4056-b241-b40153fb240c/autopage_xt_60_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62afc955-1edc-4f12-9aee-b8937b1f2aa9/90857177454.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/lafufitubotameli.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/nossi_college_of_art_majors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3685acc9-9925-4fde-a80f-15b286efb492/feritebavurowuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bdf7e0-f973-4a5a-82ca-6efd3e6d13f8/jivafirovoruno.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_off000058da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58DA 5180 bytes
SHA-256: 51eb2e101e9abb9e5c21dec44cf49743a22790a4cc39995273cb4b16dbf33036
font_01_sfnt_off00006a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A88 10368 bytes
SHA-256: f7f9571e0d96b52bd98c35733fb40008025bd6083a608d1c33d6bc420cf15ce0

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