Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a364fba19547a9…

MALICIOUS

PDF

85.5 KB Created: 2021-05-18 15:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e824726ac87a239aafd5f8de87cd08b9 SHA-1: 81c445462850c9731d5ea002198f89ad9cfea130 SHA-256: c8a364fba19547a9e68fd4f97c1585343297d9b8987318dddb802318bcd49e1f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure related to setting up a Netgear WiFi extender, directing users to a suspicious URL (https://xezojetit.ru/strik...). The presence of numerous external links, including a link farm heuristic, and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit users through deceptive content and external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=how+to+setup+a+netgear+universal+wifi+range+extender+wn3000rp PDF link annotation
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/furuxijozegudon.pdfIn PDF document text
    • http://gozatelaji.22web.org/tujinaboxemiletekosak.pdfIn PDF document text
    • http://gulexamotapa.iblogger.org/37215319549.pdfIn PDF document text
    • https://devigafaviv.weebly.com/uploads/1/3/4/6/134698058/mejulikevarite_kuvom_xigupa.pdfIn PDF document text
    • http://ruxovesubilesuk.22web.org/kaguvozulowikaginanijow.pdfIn PDF document text
    • https://lalinixew.weebly.com/uploads/1/3/4/2/134265361/xobiwigaxugiguvofex.pdfIn PDF document text
    • https://kigilejujagenit.weebly.com/uploads/1/3/1/4/131438309/lifov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jatomadot.rf.gd/arbeitsvertrag_vorlage_kostenlos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154ae681-fd67-431a-82cb-b0f588f5b5bc/how_to_scale_up_your_career.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/lojasegamibolopozob.pdfIn PDF document text
    • http://zefabufuz.epizy.com/good_books_to_read_online_free.pdfIn PDF document text
    • http://ribibepope.epizy.com/commercial_rental_agreement_ontario_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/maze_runner_death_cure_streaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef37b26a-8d57-49a9-9e94-8d6d1f894a2a/what_is_the_unemployment_tax_rate_in_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/whats_beyond_the_firmament.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/zivevuvopikatekexenadal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec90d84-4270-4836-a1e5-18b09cdaa7c9/elm327_mini_bluetooth_driver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/candy_crush_friends_saga_hack_version.pdfIn PDF document text
    • http://nawugem.epizy.com/how_is_the_media_landscape_changing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f4030a-f351-4fed-ae44-a666cdaebe8e/89382526006.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/34217686484.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_off00010d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3A 5696 bytes
SHA-256: 359f32e14f260ee89c670d43a4aab7ed0efd3d598b200adbb3592079632f5240
font_01_sfnt_off000120cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CD 11808 bytes
SHA-256: 2aaf5103f54ae6db74e8c76ba160f623a516ad5bec959997a50d84f0ebcaf8f8

Open this report in the interactive analyzer, or submit your own file for analysis.