Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b4d72cd263ac94…

MALICIOUS

PDF

44.8 KB Created: 2020-11-01 23:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a07cc4d51b8dd6448ff1a3dc16c1ee2a SHA-1: 0466aed2acb859e310fca9ff7b7d8883396ed45f SHA-256: 30b4d72cd263ac9425eefff67f22e08c016b7bed5b367c3ddfa5aa378268fd1f
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 pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely intended to lead the user to malicious content or phishing sites.

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.club/123?keyword=destiny+2+bay+of+drowned+wishes+eggs In PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/nikivi.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/pusatapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_5f9d96f3501f2.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/33e165fce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f9b6a33e6535.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/3b1dee04-098b-4023-9a3c-d04e7ab21d14/liwofuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6001/7814/files/gifenitozopufulag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1028/3437/files/31393076733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/7260/7144/files/force_unlock_phoenix_4_sim_card_slot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563198aa-e782-4142-9241-f61c6c45de54/ruxesupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/4603/2328/files/31148427078.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_off00006e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6F 5600 bytes
SHA-256: cb7d40e0410422eea5d989dfebd64313719ea86c160e71271d5b16cd77f577a6
font_01_sfnt_off0000819d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819D 10816 bytes
SHA-256: 8580dbb35f28b9efe45cf98da2b9cc28ee54c2ff9d3a82ba532690085dab719d