Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1daaa09da897c7…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 10:37:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0bfed93500a2cfd4495a4d78e1518cca SHA-1: 8780009b15afc6d4a3fe19f9e8ea600a72d8e8d0 SHA-256: ad1daaa09da897c74f906518209e4be2aad6a756f42f496821cdff78462ddca7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, 'https://crophysi.ru/strik?utm_term=the+argonauts+maggie+nelson+analysis', is likely intended to redirect users to malicious content or phishing pages. No scripts were extracted, but the PDF structure itself is indicative of a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crophysi.ru/strik?utm_term=the+argonauts+maggie+nelson+analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460247/normal_602edc2bd6559.pdfIn PDF document text
    • https://vizexetu.weebly.com/uploads/1/3/4/8/134864552/tamirod_nokovilewolenit.pdfIn PDF document text
    • https://kerijifulonuf.weebly.com/uploads/1/3/5/3/135328136/giwapanigefi_tiwetevewalon_fixuwatiliv_jozesifesevesam.pdfIn PDF document text
    • https://muzifadisuluso.weebly.com/uploads/1/3/5/3/135347683/3326811.pdfIn PDF document text
    • https://zizobisorodevu.weebly.com/uploads/1/3/5/9/135964877/7006575.pdfIn PDF document text
    • https://jujokubibafa.weebly.com/uploads/1/3/4/6/134621517/058901c34.pdfIn PDF document text
    • http://rigares.iblogger.org/determiners_quiz_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502511/normal_6054c9da1cf76.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/24e58c5.pdfIn PDF document text
    • http://zakumof.22web.org/81692119832.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/5ade38.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/9242275.pdfIn PDF document text
    • https://jizotigop.weebly.com/uploads/1/3/0/8/130874082/f4eff0b.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
    • http://bodumenijos.epizy.com/apache_kafka_jar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8de4f73-94ab-46d4-8ca5-692b4cbcac38/sub_zero_wine_fridge_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736c7ce1-f0f1-4352-8a89-e01996b8181b/wumon.pdfIn PDF document text
    • http://wimebefivisul.epizy.com/71606706586.pdfIn PDF document text
    • http://fojupejededoto.epizy.com/9214193380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e486e4-cf56-484d-85be-85f36948afc5/are_fba_courses_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762e32f6-fa37-4a90-b806-ef27293fb675/grohe_bathroom_faucet_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ba5cdb8-5572-4c91-9f54-3403f70f494a/trabajos_de_escritura_para_segundo_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc31fc9-a3e3-4b5e-b52a-a188eb6aac30/17127273299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81bc1fa-8673-483c-9c26-b87718a81183/xotic_effects_sp_compressor_bass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f887eb2c-5187-4391-8e49-055b9482a453/99462966264.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_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 5032 bytes
SHA-256: bc64d1767f58ad138e56149096b1b84e5890589ae9fea775b026ba95ccdd5a89
font_01_sfnt_off0000fd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD48 10164 bytes
SHA-256: cabd7e6d57d189cc10ba7a0aa71382a2dae6b13c9c68caf1db0c26aaff2e8cce
font_02_sfnt_off00012004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12004 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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