Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be437d88c34c1a8…

MALICIOUS

PDF

38.0 KB Created: 2020-11-04 20:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8bf67d4fbcb452988b4d65a8ecad426d SHA-1: e2649a93fe36e9d330333aeb47e932e6a94a02ce SHA-256: 2be437d88c34c1a8f827f8700899906a75e2a47dae1d4a6a15012c99b0113eb8
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though obfuscated, contains URLs that likely serve as lures or destinations for malicious activity. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.
  • 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://cctraff.ru/aws?keyword=cranston+school+calendar+2018+2019 In PDF document text
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/nasejagibevunal.pdfIn PDF document text
    • https://sedidumorasu.weebly.com/uploads/1/3/4/5/134507492/acd1236b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f88a5b337beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f871919b0f34.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/57d02b5e848c77.pdfIn PDF document text
    • https://lafapimiwegu.weebly.com/uploads/1/3/4/0/134041150/5ab5f514.pdfIn PDF document text
    • https://misaxokur.weebly.com/uploads/1/3/4/3/134354007/4140741.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/tunenijexe/ascaris_lumbricoides_morphology.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/95298158256.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/abdominal_examination_osce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5659cf77-10e2-48d6-8a4f-49788c7abe32/najefasokekupowejeval.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/8671633557.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/gawitufomi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000465d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x465D 5464 bytes
SHA-256: 69219e272ffdb2c59d6d2abeea9052a3ce9e01ef13ae8abc03fae8269aa582e0
font_01_sfnt_off000058d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D7 10668 bytes
SHA-256: 1e2c7b4c7a4f1c419025808733a312bd9c2f3e7bc121ba9351715ff2d5e723bb
font_02_sfnt_off00007d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D49 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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