Malicious PDF — malware analysis report

Static analysis result for SHA-256 196ed5ee4e06f675…

MALICIOUS

PDF

77.4 KB Created: 2021-03-27 11:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 20580642c5bec223434647baaad8fddd SHA-1: 9556d943f687685777716c85d0977def7be76f4a SHA-256: 196ed5ee4e06f675af6422573cc54c5f7c03f5d02484eeef0c9004ec47f869c9
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=wave+actions+ch+12.2+worksheet PDF link annotation
    • http://doworevo.22web.org/network_security_key_on_huawei_router.pdfIn PDF document text
    • http://jidameke.mypressonline.com/zukixobazirumisik.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/tumote.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/polk_audio_surroundbar_6000_user_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1f56b4-e9c1-41df-954f-b48e5a5efd1b/call_of_duty_cold_war_upgrade_weapons.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/52540613672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de253248-f53d-4189-9e36-f19dfa7952bc/new_york_city_subway_map_manhattan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2067c48-c4fa-45c5-8f0d-52e0213b90b7/introduction_to_flight_john_anderson_7th_edition.pdfIn PDF document text
    • http://jidaxel.rf.gd/jisasoravemujuborabizuni.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/kobuvajibezebabuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/93560711153.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/nedusaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b06cd8-7a72-47cb-942e-b251181425e4/rogets_super_thesaurus_online.pdfIn PDF document text
    • http://sinusudixuxuwad.atwebpages.com/xodifetokafanujutu.pdfIn PDF document text
    • http://zekakodususebu.epizy.com/nature_pictures_hd_wallpaper_3d.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/linda_smith_decolonizing_methodologies_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/dante_canto_19_inferno_riassunto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6bef986-0d67-483b-904f-ad0c88d332f9/cochrane_asset_pricing_amazon.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/71704484105.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_e4ad7f83f29e46029dd7fc5a1e624b1a.pdf?index=trueIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_8b21bc6bc0a64fa4aa6231c6927aac00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebaxa/bupokunozurukumosukub.pdfIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_d9c8fb1e12014f00b4863cfc7334f214.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/four_freedoms_speech_date.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_off0000ef04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 5300 bytes
SHA-256: 3c344b803d30bee29663c23b95200f3631ced7b503ac8e0a83e0d56434649f86
font_01_sfnt_off0001012e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 10800 bytes
SHA-256: 9a77fdc023421438d98176185ecf82177e726ee493c6b7ce0c57efc1e46b63d9

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