Malicious PDF — malware analysis report

Static analysis result for SHA-256 e617983e95d443fc…

MALICIOUS

PDF

84.4 KB Created: 2021-05-20 13:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 068b65903a065b6c6482c839f66cc9ac SHA-1: 1b6d8d1b1eb6a7050933afe0a0cd95bd45b24614 SHA-256: e617983e95d443fcbca2a49c2c2cee94e3c57f45459a2c24e7455a23bbef06cd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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.
  • 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://golowaki.ru/strik?utm_term=descargar+usbfix+2018+gratis PDF link annotation
    • https://josabinisepev.weebly.com/uploads/1/3/1/4/131452942/zosegizasawomapis.pdfIn PDF document text
    • https://padipemoton.weebly.com/uploads/1/3/0/7/130739419/lalatotiw-pavetapuzonupuz-nuzakibokagew-xedalabinolep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/wejixomeziveraronanokagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ec8af9-c217-4241-a3c3-f712636688b6/how_old_is_oliver_in_call_me_by_your_name_book.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/best_drums_rudiments_to_learn.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/49885078861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b8b957-2268-4f6f-8c32-7df580dc087a/what_apps_are_on_xfinity_x1.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/23944567635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78910218-3323-4670-ab71-cb59e0f3d015/40051911107.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/17605405267.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/zuvegosilitodizawune.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/votavigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659b9340-09c8-4666-ac53-91573cb5d523/how_to_unlock_an_oven_door_ge.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/36388913139.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/free_adobe_indesign_catalogue_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34eef4f0-6644-4344-b6c0-099c45fbb24b/lifitodowakovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1abd119-9623-4d05-a6be-cc8f0762bc43/77190311894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26805c2e-382e-430e-8e86-83bebecaa677/self_destructive_thoughts_meaning.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_off0000f631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF631 5204 bytes
SHA-256: 362c3d12e26cd5eaf49f48e9daa29b4ac0d3e4df4419b757c56e2b398708cfbe
font_01_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 5744 bytes
SHA-256: 10d48459d473d119bc3104d7a49f2023027aa6d0045048414212bc3c275d6491
font_02_sfnt_off00011bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD7 12632 bytes
SHA-256: 883c49459e2e69f5d9e2c2ebd0f9f4d79c11f913bb0fcf636c0801df9f27de9c

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