Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9cd6795d945f9b…

MALICIOUS

PDF

70.1 KB Created: 2021-04-01 21:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e510e356535f99ca6334a21b3d589b7a SHA-1: b2032553a37aa941dea96d1cc9065cc0cc6de76f SHA-256: 5f9cd6795d945f9b732792ed5ada0b83367beddce42e2c8a6cb77191a0b66e88
156 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 0.9997

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://jottigo.ru/award?keyword=walter+lewin+lectures+on+physics+pdf PDF link annotation
    • https://livadekawa.weebly.com/uploads/1/3/5/3/135317457/b0f82e6d5.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefaxeker/8H2ic4F/sample_literature_matrix.pdfIn PDF document text
    • https://tenipimip.weebly.com/uploads/1/3/4/0/134042327/bodopiwo.pdfIn PDF document text
    • http://luzupogakij.sportsontheweb.net/jesus_como_terapeuta_anselm_grn_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/c1fifhj/64639991963.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/koguvajozivewudiwuzoni.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/cgcbvkz/tumblr_video_er_opera.pdfIn PDF document text
    • https://cdn.sqhk.co/nutanujel/2gdifN3/61328040586.pdfIn PDF document text
    • https://radixukawatezod.weebly.com/uploads/1/3/4/6/134645496/zeroberiveperepivogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/the_last_of_the_mohicans_streaming_vostfr.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/apa_reference_format_et_al.pdfIn PDF document text
    • http://bajefeluxit.rf.gd/96782906453.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/sitanutoxajumaberugitugu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/best_2000_watt_inverter_generator_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/47901908502.pdfIn PDF document text
    • http://zemadepa.rf.gd/teddy_dreams_and_nightmares.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/52415111208.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/41657513486.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/lomibe.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/anastasia_song_once_upon_a_december.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_off0000c28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC28E 4000 bytes
SHA-256: 06579569c5c6e37ed5dcd56175b8847176c38f883d69daa9ba351ec5b8c97fdd
font_01_sfnt_off0000d09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09C 5448 bytes
SHA-256: e0b49559c09e0829bdbe6daed80df71f6d9ba5cce58f5ce71a75160cf66f6218
font_02_sfnt_off0000e342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 12556 bytes
SHA-256: 552341ae281f57af3caf14e3ec3fbf97adcad10bdcd84da73660f67bc2bfb01a

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