Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6503cee3f501200…

MALICIOUS

PDF

73.4 KB Created: 2021-03-13 23:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13ed93fe4359391128453ae2485ea8df SHA-1: 1095f8e838c9ca5fea657eba1686c9e121210624 SHA-256: c6503cee3f5012005488e565c4af3c1028cc3c66107a7da89fa1d3d09282040a
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/123?utm_term=tektronix+oscilloscope+465+service+manual PDF link annotation
    • http://copyrighytsupport.com/41246273435bcd8f.pdfIn PDF document text
    • https://vilamewu.weebly.com/uploads/1/3/0/7/130775649/3874454.pdfIn PDF document text
    • http://islta.fun/lekukinafusobuwegidofit2xps.pdfIn PDF document text
    • http://leopolds.space/10212849593j4xji.pdfIn PDF document text
    • http://investmag.org/televadanurexayq0.pdfIn PDF document text
    • http://itabody.space/how_to_install_kali_linux_2020_on_virtualboxse2sc.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/lejizo_gibawotit.pdfIn PDF document text
    • http://alkim.xyz/nonebodemojowozdhhis.pdfIn PDF document text
    • https://gekofixesijivex.weebly.com/uploads/1/3/5/9/135961820/7368609.pdfIn PDF document text
    • http://umkatrade.ru/bafojesevipakawegesemapiqj53z.pdfIn PDF document text
    • http://powerhdniy.space/bruno_mars_24k_magic_album_torrent_download8drst.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_ae146e44e31640bb957736d5fed40b98.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/941625d9-3884-436a-93c4-57fbe60fd466/51561185527.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_b9faf962a43c4bd4b02f5ed879aee54b.pdf?index=trueIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_6cda7d4325754b8aa13f61763f16dcac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubafezin/37912805785.pdfIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_434a377d8dd24fc48b230b6026dc0680.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de48f8d-f475-4cfa-9d3c-552f68ead30c/auvio_bluetooth_speaker_pbt500_pairing.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/vevosamofemu.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_62592da8c0de431b8a992c14687f3273.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xubifupi/minister_of_india_2019_list.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_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 5584 bytes
SHA-256: 0d0e8578c38a6707ebfbcbd8de1e031c861de3cd3b1dc4fd950ea0958b64cdd4
font_01_sfnt_off0000f3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D9 10628 bytes
SHA-256: e93c670976659adbf7c6fdfc7271d0ceaa73670fab4c3d8e90af5b21bc92a641

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