Malicious PDF — malware analysis report

Static analysis result for SHA-256 d565736fc8e71f1b…

MALICIOUS

PDF

70.8 KB Created: 2021-02-22 22:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0971d126a5d8a2bc6731a7e860c5e3b3 SHA-1: fff6a995d01851602ba72c23e1801311601a021f SHA-256: d565736fc8e71f1b56de7764a6793d007e5bcd0fc26157c98d13c301b173e0ee
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and an ML classifier, indicating a phishing or trojan payload. It contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The primary URL, 'https://jacksth.ru/aws?utm_term=how+do+i+change+the+battery+in+my+nordictrack+elliptical', appears to be a lure for users searching for technical support, redirecting them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/aws?utm_term=how+do+i+change+the+battery+in+my+nordictrack+elliptical PDF link annotation
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/624510.pdfIn PDF document text
    • http://com-signto6.xyz/angkor_wat_tour_guidesho8h1.pdfIn PDF document text
    • http://dazinifuxevoji.22web.org/jebegal.pdfIn PDF document text
    • https://kevititexozasen.weebly.com/uploads/1/3/2/7/132712545/pikikumetarajex.pdfIn PDF document text
    • https://wakejowedab.weebly.com/uploads/1/3/4/5/134599651/5317132.pdfIn PDF document text
    • https://zowololo.weebly.com/uploads/1/3/5/2/135294949/mibavefuvi.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/1242700.pdfIn PDF document text
    • https://fusofopafufet.weebly.com/uploads/1/3/5/2/135294951/bufelimek.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/bhai_the_gangster_game_hack_apkcdyyq.pdfIn PDF document text
    • http://site-shop.xyz/48795518440c3bjj.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/xotomisen/rosemarys_baby_movie_ending_explained.pdfIn PDF document text
    • http://gajitigigezujan.epizy.com/24884914842.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/57195752933.pdfIn PDF document text
    • http://bamasivira.rf.gd/60930992247.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/6263299842.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/key_largo_marine_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/ak_47_wale_remix_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/widcomm_bluetooth_software_64_bit.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_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 5668 bytes
SHA-256: e6087c4998b6226a20c9f9d0b35506342901e676d5d48bf79bf63f19f0ff66b2
font_01_sfnt_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 10196 bytes
SHA-256: 507e01d85b991935cc8cbe7de2217103791ef3baea7a6f9d20cf448a340d5f37

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