Malicious PDF — malware analysis report

Static analysis result for SHA-256 da91a370e6997ed0…

MALICIOUS

PDF

75.9 KB Created: 2021-03-09 22:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: be438b94b69f130fc41765062f2e3e20 SHA-1: bbd3f5b6ec4da24603d2b9038716c0eba56f63ac SHA-256: da91a370e6997ed0066cb98c8ac8b48b0ef691efa4fee52cdfb44d5ff0ff195d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a PDF link farm. The primary URL points to a domain associated with SEO spam, and the heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links designed to manipulate search engine results. This suggests the document's purpose is to redirect users to potentially malicious or spam content, aligning with a phishing or traffic-driving attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/award?keyword=estilo+de+vida+sa%25C3%25BAde+e+meio+ambiente+pdf PDF link annotation
    • http://lofajemami.sportsontheweb.net/cisco_dta_170hd_searching_for_channels.pdfIn PDF document text
    • http://mozaduz.mygamesonline.org/88488037815.pdfIn PDF document text
    • http://sweetmeet.online/72282915554p938f.pdfIn PDF document text
    • http://googsnat.space/zenugizanagazufojusikade10301.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/does_brother_dcp-7065dn_have_wireless.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/58048453952.pdfIn PDF document text
    • http://xteenware.online/nobapovijogigovckq7p.pdfIn PDF document text
    • http://tiriruno.sportsontheweb.net/30722105810.pdfIn PDF document text
    • http://levantegroup.net/13788106616h9wjc.pdfIn PDF document text
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/vomujegediko-lopisepe-podakimu-dodoxugozoj.pdfIn PDF document text
    • http://kaboliwup.mypressonline.com/gunujose.pdfIn PDF document text
    • https://defosojuregoko.weebly.com/uploads/1/3/1/3/131383900/4228472.pdfIn PDF document text
    • http://rocketdocs.us/vuximakivotewizilubxv7kd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pudolajuji.atwebpages.com/41738672952.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/buzorisitawo.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/bitokazoviwerup.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/zezof.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/a_simple_favour_trailer_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/noxeseket.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/crystal_report_for_visual_studio_2015_tutorial.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/ridoxamutuxomedasefo.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_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 5364 bytes
SHA-256: 7626ed3271261dffd79b630a3288b07d4fab2952892cc8c73a82c88218061937
font_01_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 13184 bytes
SHA-256: a749067c8aef2870f530974f24b4e03d4f721e213157b56a90db9574d5908c21

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