Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ba02a8556fee41…

MALICIOUS

PDF

78.8 KB Created: 2020-11-13 05:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8e96b02095cec6af5f3c8f103bcb67db SHA-1: 778bfe28a92b4bd76e8a46c4676198f1e1d10648 SHA-256: 99ba02a8556fee41f7359b8b2499294566027cf3a42b7e3ad286638fa306a399
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external websites, including a known malicious redirector. The document body, though obfuscated, suggests a lure related to Windows 8.1, likely intended to trick users into visiting malicious sites for phishing or malware downloads. The presence of a link farm and a critical heuristic for malicious redirectors strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=windows+8.1+professional+build+9600 In PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/2289554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f915b5b8c27e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_5f9b2dc9ac92e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427785/normal_5fa39806dac58.pdfIn PDF document text
    • https://rineragafuvotut.weebly.com/uploads/1/3/4/4/134442037/6022602.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/sikelelefuguze.pdfIn PDF document text
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/jibavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486987/normal_5faba96a7f67a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5f984c74bf537.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a9d1d72-02f4-4018-b0c7-fca50048df66/house_of_blue_leaves_monologue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c926088-b56c-4da6-a47f-9c99e546c9b4/87028574097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429bbae4-8b03-4dcc-89d8-739e29c66669/please_don_t_go_80_s_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7baaf0f0-740e-495d-892e-895d9beca4e5/kozojibenevogesage.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD093 6008 bytes
SHA-256: 9223416cd7f6273cc60b77fdfe7138b29908e408d15a0477652e483d6e42dc8a
font_01_sfnt_off0000e522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE522 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 11108 bytes
SHA-256: d9e61dd50a3517b8192c845824d42f3637a27d4d0ffa0b8f1631e8a250c28ef2
font_03_sfnt_off00011686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11686 6704 bytes
SHA-256: 39ae62b309d50ff32cae245313d40627df4d4ffaa49f3b28e8000f0a4f56d1e5

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