Malicious PDF — malware analysis report

Static analysis result for SHA-256 56cd30387ad4b3e0…

MALICIOUS

PDF

70.5 KB Created: 2020-12-08 17:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4df39c71f3e92175e7d3e51815adccfc SHA-1: 285b491247b71a852ec10752074685b6bdaf21f2 SHA-256: 56cd30387ad4b3e033078352d3b1b77eda1442ce13e4c22642cadac8b4eacb3c
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/strik?utm_term=ca+state+standards+science PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5fc613342acd0.pdfIn PDF document text
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/e0e9cb36ec4.pdfIn PDF document text
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/bamalatoxib.pdfIn PDF document text
    • https://wajegeteb.weebly.com/uploads/1/3/4/8/134896445/6013679.pdfIn PDF document text
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/fatugivorivel_ganiziden_xusodafofave_vuvimefalagato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc109232cf09257bd6ccb44/t/5fc5c2533570fb44d1ca6ea5/1606795861028/85240682384.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/jesse_livermore_stock_market_system.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/22186645405.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6b83dfdd95b60d5131d/t/5fc1bb523485235c86075624/1606531923342/thing_thing_arena_3_newgrounds.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e15d7d0c8f249d40b1da/t/5fc1321f3485235c86f20921/1606496799024/ranidogomajetepe.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/20711751271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b314a6d5-43a4-43a7-93f0-442de080a2d1/38021821161.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54de5d26ff1194f911033/t/5fc84c5d90a4f8549d73b3df/1606962272802/morgan_iga_friendly_grocer_hardware.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_off0000d834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD834 4808 bytes
SHA-256: 8405bc6594b00872905a17c1d2b41a9907ae8dd8259e4cc27ed7a323c09be39c
font_01_sfnt_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 10936 bytes
SHA-256: 5ce0c6107c4098a27b01df0f0a1fcf9263df872d68042f75b1a4f542bcbd735f

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