Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0731eeb94692ae…

MALICIOUS

PDF

41.8 KB Created: 2020-10-03 08:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: af4d8d7871c36faecdd7ef871fcfa80a SHA-1: 555d00d6501d06b77aa1251adbc905a568956935 SHA-256: ae0731eeb94692ae0f167c5c5cb4e7a763e27496deff3ed15546917a4eb9ed84
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to lure users to malicious sites, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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?keyword=reported+speech+comics In PDF document text
    • http://files.hazelsnetogo.com/uploads/1/3/0/9/130969220/kigoga-tizipeboladus-xidajefoz-kokasupeletujo.pdfIn PDF document text
    • http://files.designedbyjpp.co.uk/uploads/1/3/1/4/131408024/wemezofumaza.pdfIn PDF document text
    • http://gadig.geogbarrbeacon.com/uploads/1/3/2/3/132302987/41521a4db.pdfIn PDF document text
    • http://files.chambleesoccer.com/uploads/1/3/1/4/131438018/1a5de.pdfIn PDF document text
    • http://naxidul.chicoanimalshelter.org/uploads/1/3/2/8/132814930/6456490.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/d3f72d96-7802-416d-9398-9108fa73d3cf/63632643675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5d6077-993e-459f-ba90-5ec0439037d4/tututepexosezapodiraru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df203b6-4a6c-4943-83ea-7804ae221e0f/21455450800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e392a27a-f58f-4c7a-b3e7-7ef392fc05ee/37453400495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db703944-8bbe-4c5c-a9cd-fea66670649c/pojamabelopamagedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1583c1-7141-463f-a1e4-64f593e435f7/jigexopivaneraxolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15247ef5-92cb-4709-ae97-fe6cfb3ec3a9/dawosegaduxufigajewozarox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0258/3449/files/auto_go_scooter_charger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9055/6568/files/84747905316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9424/0151/files/lambo_door_kit_for_dodge_challenger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3548/3551/files/16457911123.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_off00006655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6655 5076 bytes
SHA-256: e74a6e5e9212fcb2565e4d1bc517d1ec4704c5b869664c1f1e6333a4aac198d5
font_01_sfnt_off00007778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 10288 bytes
SHA-256: 8bcb6b48a3e5d38ac2191a5300bafc592ca213510ede737e5006a010b21acbbd

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