Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d604ff377afda5…

MALICIOUS

PDF

81.3 KB Created: 2021-03-16 07:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b6c0673764235a714033b1e328ef8f90 SHA-1: e6b96e92c9ec0563728265994192599924f155b0 SHA-256: f2d604ff377afda5c79c08a41efb5baebb91134dc0745c63c83ef8d07e539adc
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://xezojetit.ru/aws?utm_term=como+realizar+un+mapa+de+riesgos+laborales PDF link annotation
    • https://cdn.sqhk.co/pixorikibam/ebGJtgc/zasivukipe.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/ichbgfZ/jeredogowul.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/gihcigw/bimomutadaroximajup.pdfIn PDF document text
    • https://cdn.sqhk.co/bufomofa/ia8S1Z2/jowizem.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/weqidji/fallout_shelter_online_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/velujuvaxal/hRLhhjh/tamil_nursery_rhymes_video_free_download_hd.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
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_11a451a6460c4716a0044161e26df5fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e05b12-5f6f-469d-a357-c60264781ab2/kolisigeketenos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da69bd3-0e44-4b3a-9c07-5c68cdc0732d/why_did_my_dryer_stop_spinning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a56f5e-552e-4581-b30a-aed9416085be/dshs_individual_provider.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0940797a-397a-4763-bc0e-ac40c569b544/namadusojukes.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/me_before_you_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22f26e6-d1c4-471e-9b46-ef312601a748/harry_potter_lego_advent_calendar_2020_contents.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb3c4aa2-de76-4e56-a4c0-4c0b1bc269e6/balonirut.pdfIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_4531ae3ae3314c238c10ad5a01164063.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/android_activity_background_color_theme.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/why_is_tone_important_in_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/14220454413.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_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 5296 bytes
SHA-256: 5bae77ffbaf62ba0ecc6298b2e247cefb41fba1960f4a2615aa664a86f4aa494
font_01_sfnt_off0001080a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080A 10372 bytes
SHA-256: 374a81d8e4240d2bcb40574b92e3de4668f91cb29082fb01ffe43ef61b9a683d
font_02_sfnt_off000129cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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