Malicious PDF — malware analysis report

Static analysis result for SHA-256 378fd9b0f2058590…

MALICIOUS

PDF

74.4 KB Created: 2020-12-25 01:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11694d689b3f143028f34774709fd387 SHA-1: 7604ab648af95d1166772edbfd7c50e8580d1b8a SHA-256: 378fd9b0f205859038a0e544d37dbcdcf5a41420b3321f89d747b5a14f8f3b55
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to SEO spam and redirector infrastructure, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature. The document body, though obfuscated, appears to be a lure related to song lyrics, likely to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?utm_term=nick+jonas+camp+rock+2+song+lyrics
    • https://samibogamo.weebly.com/uploads/1/3/4/8/134883552/8c52179ac426c46.pdf
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5fda9485592de.pdf
    • https://cdn.sqhk.co/fidapulano/Bgehigg/entrepreneurship_development_and_communication_skills_download.pdf
    • https://mozosuroje.weebly.com/uploads/1/3/4/4/134456199/filabux_fekiwanej.pdf
    • https://cdn.sqhk.co/doxinotilid/jbigX2B/70145947144.pdf
    • https://cdn.sqhk.co/fomavulobet/JK6mhic/gaxawamedabufu.pdf
    • https://cdn.sqhk.co/bagudivibi/zhdJgcD/87215103802.pdf
    • https://cdn.sqhk.co/gaxumisi/Aicl4ia/33489192559.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3de260bb-3eea-4d0e-b573-266f9b143916/body_on_tap_shampoo_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/9c4ce6d0-5b01-4dc9-8338-dadd9e370d1b/53070180602.pdf
    • https://s3.amazonaws.com/jujadodedaruxix/45275463894.pdf
    • https://uploads.strikinglycdn.com/files/eb8a08d9-b963-402a-b0b4-99b8b296f3e7/xewaletugo.pdf
    • https://uploads.strikinglycdn.com/files/9b644cb6-12b4-497d-a8f8-96a55340106e/xolenegusodabajuf.pdf
    • https://uploads.strikinglycdn.com/files/89674475-e2d8-4945-9a79-f05cbca52932/mercedes_benz_fault_code_manual.pdf
    • https://s3.amazonaws.com/paropabaru/22020461183.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e490.bin
3bd512d00d7abad9fca10ea9fbfeb46e963ea3c0023cd8fab1d6b8dcc5cfe32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE490 5596 bytes
font_01_sfnt_off0000f79e.bin
2fb1e4b907e14c59b0c56f9fe13edbdecdab56dd2d3b068f67aa8470f24b1b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF79E 10844 bytes

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