Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93813b7c2dcb79a…

MALICIOUS

PDF

53.9 KB Created: 2020-11-02 10:05:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 929662891beee53836f7b94b76449764 SHA-1: 342c001a0a3af6603da220f5b2abdf93ba15854d SHA-256: a93813b7c2dcb79a58267c81db1d7361dd08398c8b55820cb3af6208defaaed0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, suggesting a deliberate attempt to redirect the user to potentially harmful 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://cctraff.ru/strik?keyword=shark+euro+pro+x+sewing+machine+price In PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/wujidomepedig-ninepewomopeba-sewirukal-ramitidafanug.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/3974900.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/ruketuvazataga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5f9bc3490657b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f923029cfe88.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/9594994.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/3933556.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://s3.amazonaws.com/zuxadol/vakojunabekijiverilevepi.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/88938344208.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/sodesabekimon.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/unable_to_run_bootsect_windows_7_usb_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/mukipapawuguwijaxazixumu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/besezale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f5e0b4-5381-4a00-a935-bbbd0baecc0f/rulopuxoson.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/mpsc_books_list_in_marathi_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f97fee-5e8b-4de2-90b1-939202c18ac5/menit.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_off0000868a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868A 5444 bytes
SHA-256: d62a01113f448a40a1f5c5fd994f654a071e01082a69a889fb8688cfdfedda4a
font_01_sfnt_off000098e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98E7 10408 bytes
SHA-256: 1a23eee0fffecf87330e5e1f54d535ad9305862e967601ffe1b881b0aaec5133
font_02_sfnt_off0000bc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.