Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e42ebd8045afdd…

MALICIOUS

PDF

76.9 KB Created: 2021-04-03 17:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bc77c101d357a728d34cdf0ded8d4ab9 SHA-1: 6d535b9792eb0faf6b07e01464fb5643e38d9ff8 SHA-256: 80e42ebd8045afdd6e6afdd3259681a60fbfc17f6440a19af598008bf4cf83a9
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The embedded URL 'https://resalured.ru/wix?keyword=kik+apk+android+2.3' indicates a potential attempt to trick users into searching for and downloading malicious applications. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://resalured.ru/wix?keyword=kik+apk+android+2.3 PDF link annotation
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/6113438.pdfIn PDF document text
    • https://wukisusu.weebly.com/uploads/1/3/2/6/132696029/849668b9032d7.pdfIn PDF document text
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/59a33dc58.pdfIn PDF document text
    • https://modagifamu.weebly.com/uploads/1/3/5/3/135341464/76ad5.pdfIn PDF document text
    • http://lordtrans.ru/fimoroguvamikesudeniw00x6.pdfIn PDF document text
    • http://freud.icu/achi_baatein_in_hindihmbu3.pdfIn PDF document text
    • http://businessoutsourcing.org/xebodafaripotajojosozewlxt0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zotitutuxizokox.epizy.com/lezafereb.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_2b6e0643b5f9453daf650d3f1106023a.pdf?index=trueIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_368a6307afc24cc5a4399e2454ac4070.pdf?index=trueIn PDF document text
    • http://vinixozu.rf.gd/57918162751.pdfIn PDF document text
    • http://nedudumitariz.epizy.com/46969998432.pdfIn PDF document text
    • http://zuvewago.epizy.com/encyclopdie_du_chocolat_valrhona.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_7c7b4c25b78e44b1a06e32b39393c8e6.pdf?index=trueIn PDF document text
    • http://lesexugisitu.rf.gd/dna_the_secret_of_life_worksheet_answers_biology_corner.pdfIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_3e5e3a6f29984c84bc128a2b33c5c939.pdf?index=trueIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_491d75869a0542faad9d8daeeb8437f0.pdf?index=trueIn PDF document text
    • https://f568b852-d776-40fc-afde-b4c2ef929a3a.filesusr.com/ugd/2d6fb2_d7271c122bae415abac8a381882b978f.pdf?index=trueIn PDF document text
    • http://susupufewowe.epizy.com/accounting_standard_32.pdfIn PDF document text
    • http://mujigivufutufu.rf.gd/59328065166.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_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 5104 bytes
SHA-256: 24d384f83c7984ebe0f477b656fb90b27e8ed15b9c6828907c16280c6dda9418
font_01_sfnt_off0000ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 10948 bytes
SHA-256: 48dcc1f1e05e052c437e46a4e8f13ad74f40a86c24d27e8394aba00668c35de8

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