Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e42dd8ad21467b8…

MALICIOUS

PDF

69.6 KB Created: 2021-03-17 13:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 15e268c683565247273ade6f833078b5 SHA-1: 1a4cdc0cb4eefdf0dfaa2cb0fc7e64419c2d6d1a SHA-256: 8e42dd8ad21467b87cc759b3a2bd2df89ec5df564b11c26fd2e7627c2f21fba5
186 Risk Score

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 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=how+to+reset+la+crosse+projection+clock PDF link annotation
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/balinivatewolor.pdfIn PDF document text
    • https://fomilapemarujan.weebly.com/uploads/1/3/0/8/130814088/8fede1255d7b9.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/succeeding_with_agile_software_development_using_scrum_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepirodineloga.epizy.com/saputatopez.pdfIn PDF document text
    • http://gukamapi.rf.gd/what_is_an_heirship_affidavit_form_texas.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_0b29e7063cea46b49ee687974cb98065.pdf?index=trueIn PDF document text
    • http://mowelafawugek.epizy.com/rajonejajuxugifubuse.pdfIn PDF document text
    • http://tevaluzax.atwebpages.com/how_to_write_an_ebook_for_amazon.pdfIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_4b95b4e4c9204b9dbe3e8f897788eb7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/coming_out_on_top_frank_guide.pdfIn PDF document text
    • http://vafotapezetu.rf.gd/74329441953.pdfIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_5a6802a3b23d4a339903ba91d958cf18.pdf?index=trueIn PDF document text
    • http://zubiluwetij.myartsonline.com/giwolujajug.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/zelda_twilight_princess_manga_band_6_erscheinungsdatum.pdfIn PDF document text
    • http://zuriromaruwo.epizy.com/karin_slaughter_blindsighted.pdfIn PDF document text
    • http://kegebezevenaku.epizy.com/6602417698.pdfIn PDF document text
    • http://zadagudigewe.rf.gd/video_player_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/beginning_english_language_learner_worksheets.pdfIn PDF document text
    • http://vekamujibatebig.rf.gd/10906118868.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_off0000d34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34A 5120 bytes
SHA-256: 3b467473bc2a796b4583a9ad675d0dd8f5aab509c1e433bd7dd1f6b1b860a6d4
font_01_sfnt_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 10688 bytes
SHA-256: 796b81e892102f7096c2a88685a71330326da175dca14c1aa59cbef9650bdebc

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