Malicious PDF — malware analysis report

Static analysis result for SHA-256 2679cb0ba2d23f03…

MALICIOUS

PDF

88.3 KB Created: 2021-02-16 09:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4a212b27ba436ebd7935c763497c2671 SHA-1: faf2f2ee080308a240bff034d0a0f301b8bbc037 SHA-256: 2679cb0ba2d23f03c9db7fae5ff771eac2f05352dfbeb7526087d3e74520822c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing trojan. The presence of embedded URLs suggests the document is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/wix?keyword=richard+lupkes+biography PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468828/normal_6000f6a14dc2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390999/normal_5fec71c63ac93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421471/normal_5fc7c6e046bcc.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/rfsgcXm/download_stick_fight_king_of_war_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459805/normal_5fdce2167f0ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487192/normal_600ae5485f87c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496148/normal_5ff9c01f05b5b.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/977230.pdfIn PDF document text
    • https://cdn.sqhk.co/xezafube/hc0tdHA/jifatug.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/u4JjcA8/4runner_nightshade_interior.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/wetetezebebe.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/K4hchhU/airbnb_near_me_with_pool_table.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_6019f218f2211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5ff1721091e17.pdfIn PDF document text
    • https://dakijixubuleze.weebly.com/uploads/1/3/0/7/130740496/c87d802.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367303/normal_5fca79b5e9327.pdfIn PDF document text
    • https://pukefigagarit.weebly.com/uploads/1/3/1/4/131406744/risaxobowoxose_megudoxe_nuxepi.pdfIn PDF document text
    • https://cdn.sqhk.co/muzolorakow/jjwZVth/line_graph_in_excel_online.pdfIn PDF document text
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/8136455.pdfIn PDF document text
    • https://javodezupaxut.weebly.com/uploads/1/3/1/3/131380273/lakaxewen-xunufeferafodug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/periodic_table_class_10_cbse_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/deduwumomoxonobepe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F79 5344 bytes
SHA-256: 530b00ae14a63ad787e0aa54313b73b745b1a0622afd926f2c5ca122bbe881e4
font_01_sfnt_off000121af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AF 10432 bytes
SHA-256: 2dde4e181db51f8b5f74318b8ca48132c8a2d95b0d0bbf14d19ca92f7d979b3d
font_02_sfnt_off00014557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14557 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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