Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1bd9a9ba14fe25…

MALICIOUS

PDF

40.2 KB Created: 2020-10-04 04:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 117f4a4e3292f6a5b85efb025fedc405 SHA-1: 6c12899b733464055fd8a8cd12c0b32602377b35 SHA-256: 2d1bd9a9ba14fe25ef568d6a4efc89ca3246f0822fba5cf29dec9fa1446028c4
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to suspicious domains and are likely part of a link farm designed to attract traffic. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/pify?keyword=wolf+of+wall+street+watch+online+free+reddit In PDF document text
    • http://lemimun.morningsidecommunitychurch.com/uploads/1/3/0/7/130739416/wewokeduposugij.pdfIn PDF document text
    • http://files.communicationaactualized.com/uploads/1/3/0/8/130874254/1060423.pdfIn PDF document text
    • http://files.nomadicamerica.com/uploads/1/3/1/3/131383510/duzujamubiviw.pdfIn PDF document text
    • http://files.unorthodox.online/uploads/1/3/1/4/131453268/vozeri_dejeduzibifo.pdfIn PDF document text
    • http://files.whippoorwillfarmcsa.com/uploads/1/3/2/3/132302916/derevip.pdfIn PDF document text
    • http://terituwes.tales-trails.com/uploads/1/3/0/7/130738632/vudasupuzojaze.pdfIn PDF document text
    • http://jezosa.stpetersaustin.org/uploads/1/3/1/4/131438860/7687563.pdfIn PDF document text
    • http://meworij.tretheweyguesthouse.co.uk/uploads/1/3/1/4/131437889/9ed9a78d7.pdfIn PDF document text
    • http://musodaw.susan-mcmahan.com/uploads/1/3/0/7/130775557/vugajatod.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/1/0433/9453/1486/files/foxconn_n15235_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6182/9528/files/21751127055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5312/0679/files/97548367725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0728/2847/files/venimomopibeboziguxavamub.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_off00005f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3C 5212 bytes
SHA-256: 1124b989d5fe625b0b662b8b79fce09f9ba7b884662c1db2b700901d71a48bd2
font_01_sfnt_off00007109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 10296 bytes
SHA-256: 448bb78a8b6f1a251745bd78cfed82dddbcc58ff03dd6eec4a940642af4cfd8d

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