Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a58b646dd2380c…

MALICIOUS

PDF

41.2 KB Created: 2020-10-13 20:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8351c9dac92e8df7b6d9cd90e04b2b25 SHA-1: 3261acb583cb0a90141c75a8d8717ec6d6fd213a SHA-256: a0a58b646dd2380c529c5ef33d4b351d57cf37b6657d21b8b83cc5237b07cf22
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a critical redirector link, indicating a phishing or scam attempt. The document body text and embedded URLs suggest a lure for a game hack, which redirects to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=los+sims+freeplay+hack+apk+mod In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/3079835.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/all_fnaf_animatronics_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/is_dhgate_reliable_for_jerseys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8187/8689/files/89689883679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0590/5568/files/clip_art_cartoon_red_blood_cell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/23412224672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9416/6683/files/skechers_nurse_shoes_white.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5789/2506/files/type_of_texts_in_english.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_off000061d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 5504 bytes
SHA-256: 4386bf21dd5481a232b23f28305ceb2368c34b728c3b11ff3a1cc2ab5f4604c2
font_01_sfnt_off00007470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7470 10420 bytes
SHA-256: 70652c7c7c068ed6fa216b6fad3c8516338f2d427773d7d4f153aeb8e2a3562d

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