Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5ce3f32cdc12c7…

MALICIOUS

PDF

40.0 KB Created: 2020-10-11 22:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 61d7d024a72f11ebdd38613ae2329839 SHA-1: e07334391a4521658a3dcf173d8baa55b8e0d5a6 SHA-256: ee5ce3f32cdc12c7a3913be8d2d7b3b879f9ad3a2682fe17ea1ecedda02fde86
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a large number of external links, including a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, suggesting an attempt to lure users to malicious sites or spam content.

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://ttraff.link/pify?keyword=cylinder+and+slide+1911+parts In PDF document text
    • http://wiluvu.kemptvilleacademyofmartialarts.com/uploads/1/3/2/3/132302987/xozurevoluzevut.pdfIn PDF document text
    • http://files.thedelidownstairs.co.uk/uploads/1/3/0/7/130775515/nibub.pdfIn PDF document text
    • http://gapuzaja.pranicspark.com/uploads/1/3/0/8/130874175/94844eb.pdfIn PDF document text
    • http://bilere.cvpolygraph.com/uploads/1/3/0/7/130738711/futelubapuxuvikefo.pdfIn PDF document text
    • http://tuxero.whitehallnaz.org/uploads/1/3/0/7/130739967/monane.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/52aa5dab-6f13-41b2-a3b7-982413361968/wukumefifenuzuduzus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ecea79-16b3-4159-86a5-36c72964fadc/nujovurezivovifoworunibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1886180d-1299-4fb6-b372-176463b49308/31443201179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/047241f1-a590-4a00-af80-d72bfc186980/sojogibabogosumitegete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0fb7d63-51f2-4c77-9c07-2d422b847a23/33758870316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd5b7e7-6300-4596-be96-340469187340/negufor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd49673-b6da-42a5-905d-e9e3fa418c38/15538558154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/811280e2-09f9-4081-8620-2b66440958bd/kutapomidupabepir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442b8718-9e09-4241-aa96-e7441ddc9542/kuriv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6554/3329/files/life_in_paradise_2_uncopylocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/3742422553.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5329 4964 bytes
SHA-256: 5dd0b61641aa6e2e405ea206018e34f2ae4044ae2a62822ba17a95fc0aa97135
font_01_sfnt_off00006416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 9644 bytes
SHA-256: 6d7013b218cf80df2fd827a040fc5e95ed1262b5ddd56e10daa1e9985924de53
font_02_sfnt_off000084f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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