Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2840f3718f4194a…

MALICIOUS

PDF

83.4 KB Created: 2021-04-01 21:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4b837f40a1fb089c8f007431d4f4c783 SHA-1: 5d4fd4fb1afe43be9eeceb1afe7ffb63a2ba71af SHA-256: e2840f3718f4194ab13a12e07580c58f0c07e8ac675b87a600b29239c0f4e5d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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
  • 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://jacksth.ru/wix?keyword=el+rosario+de+la+liberacion+pdf PDF link annotation
    • http://gejejasofubi.mywebcommunity.org/35850635645.pdfIn PDF document text
    • http://nipawifaxupus.mygamesonline.org/bukhari_shareef_book.pdfIn PDF document text
    • http://fajafifog.mywebcommunity.org/bikebabege.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/cghd460/kotuxazomolufe.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/86598767444.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/51971667595.pdfIn PDF document text
    • http://dubapevokitux.22web.org/multiplying_decimals_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/hb4hhw5/69115822526.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/makebasezetebadaja.pdfIn PDF document text
    • http://viwavidif.getenjoyment.net/polyarteritis_nodosa_adalah.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://taguloxutenafol.myartsonline.com/78157978911.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_933532a5126e40d8bee5a7874c482421.pdf?index=trueIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_3b56b4b350ec4957980e3c860579805c.pdf?index=trueIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_73123d41b16f4444ae2554906e30249c.pdf?index=trueIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_e65ce3ff68744a139bf7f6546b6b790e.pdf?index=trueIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_b06035c50dda45a6ba4bd3c7a2f4e52d.pdf?index=trueIn PDF document text
    • http://kanisal.epizy.com/pukowogezirepumug.pdfIn PDF document text
    • http://lexizilasajeso.rf.gd/87782248811.pdfIn PDF document text
    • http://revodez.myartsonline.com/relatrio_auditoria_interna.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 5244 bytes
SHA-256: 3e13f4aec0f0b5bca10d5a5a1e8792eb72300a8996f9655c4a7e74dbd83976ad
font_01_sfnt_off00010178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10178 7888 bytes
SHA-256: b544a9d932498493701a6f7f333b961dd21cbd06ffead49699b801f4b85886c7
font_02_sfnt_off0001176f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176F 12236 bytes
SHA-256: 85935c2fbce0b845ceae5f6a9222da39dc021501a15a5fe1a61d15b56768c2a6

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