Malicious PDF — malware analysis report

Static analysis result for SHA-256 25abfcaee3b33d18…

MALICIOUS

PDF

76.5 KB Created: 2021-02-13 01:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a55b468822c7b706a0d3d5a7b061b3ca SHA-1: b854ce2030192ca22257f796c12b4cfd12414af5 SHA-256: 25abfcaee3b33d1838a97accbb8772f01802799ca9ef40a83f445e1d1e053fa6
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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.
  • 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://bologen.ru/123?utm_term=underwater+welding+salary+texas PDF link annotation
    • https://cdn.sqhk.co/pujixefan/jigOssP/zoocraft_animal_family_mod_apk_android_1.pdfIn PDF document text
    • https://somokowu.weebly.com/uploads/1/3/1/3/131383604/2246765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419847/normal_5fcbc26b1c9e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366047/normal_5ff28203d9aca.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/fBzjc3b/jump_shooting_modern_warfare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454556/normal_5feec54cd1782.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/uYigP8H/dekitetalijabipafimodaz.pdfIn PDF document text
    • https://xovokemopozok.weebly.com/uploads/1/3/4/5/134579322/zolurowamasijokeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501482/normal_5fc648044b5a4.pdfIn PDF document text
    • https://fogojokiverowur.weebly.com/uploads/1/3/0/9/130969702/rageberetuvatama.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/pTghPja/97912764396.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/zoxirifu.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/3bb6331000.pdfIn PDF document text
    • https://cdn.sqhk.co/podidiwi/jeR9ijG/76047868763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_601603bb97895.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/wihasmg/messi_vs_ronaldo_free_kick_goals_statistics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 5244 bytes
SHA-256: 574205fcf86e4c89a2c2b2a87db66ff42529a3a53b9ea0078c18e649621f1615
font_01_sfnt_off00010022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 10736 bytes
SHA-256: aff7baa26caaa9368a42b2baff65acde4d1f179b41dc48e3b1c012c72b3c4d31

Open this report in the interactive analyzer, or submit your own file for analysis.