Malicious PDF — malware analysis report

Static analysis result for SHA-256 1811291f6eabd354…

MALICIOUS

PDF

71.9 KB Created: 2020-12-18 13:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dc2148ed47cd9ecba1bb6ca4559c48e5 SHA-1: e5713a570a895993561888cd20cb7c7d7596e9b6 SHA-256: 1811291f6eabd354f6c1827ca43eebdf1ed0460354020cc9c698a4f5380350c7
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a PDF link farm. The embedded content, though heavily obfuscated, suggests an attempt to disguise malicious links within a seemingly innocuous review. The primary attack pattern involves directing users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/123?utm_term=much+ado+about+nothing+play+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f91d39c1c8b6.pdfIn PDF document text
    • https://gowokijisamupu.weebly.com/uploads/1/3/4/4/134438950/kobemopek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453103/normal_5fcad6f76ad4c.pdfIn PDF document text
    • https://sozipufejelaj.weebly.com/uploads/1/3/4/3/134352325/130873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21a28fe-f2a8-4cff-906f-bb09eb6ae8bd/14512603981.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a3829955c744b546b600/t/5fcc9acdc836a917f907bcd1/1607244494559/54009872504.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27aecc14dfd36fefb8ed8/t/5fc431114e98326c02963d63/1606693137856/49481866777.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcebaee24192469dc87e5ab/t/5fd018a12f29925fbb421a25/1607473314420/fire_and_water_3_walkthrough.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe12d04f98375720a81669/1606292178004/what_direction_is_the_wind_blowing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2458a12-80d5-4e38-9b8d-4a874db19392/pazekefexesaledotopo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fe012e537a05ef0995e2/t/5fc2bc015147b148048ca65e/1606597634446/57310911943.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1beb81452f90b7feb47dd/t/5fcb819033fb14715cbc9b22/1607172500078/slot_cars_sets_for_adults.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12657ccb-352c-4edf-ae85-26c865b5a3d5/venuwevadam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33495affbf90a66f9667f/t/5fcdb7ae6f0099009e82ca5e/1607317423566/99417014988.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB16 5556 bytes
SHA-256: 71d40769865037dfd9e9c6f359a1bc24a049aca20fd8c9129dec14930a879883
font_01_sfnt_off0000ee15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE15 10468 bytes
SHA-256: 84cf3658e5cb6ada91fbe3b9c5b714192bcc409aac1217ad56aa9dca839c41dc

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