Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1edf7f3e2a9a5d…

MALICIOUS

PDF

74.7 KB Created: 2021-02-09 10:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 208963904e76cb660f5efcd00382126b SHA-1: a44b7046b2f266b4e395e3bf83967eb6896d06f8 SHA-256: dc1edf7f3e2a9a5da3629338b11d1ce7b88de7c6b9a41c89ff1ab1970045cc82
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=binary%20options%20trading%20tips%20pdf PDF link annotation
    • http://mkr-olimp.info/amulya_jeevan_823oqsgk.pdfIn PDF document text
    • https://gifenatewa.weebly.com/uploads/1/3/4/4/134480542/future.pdfIn PDF document text
    • http://tex-comm.ru/91887468382wvj0e.pdfIn PDF document text
    • http://smartline58.ru/ap_10th_marks_memo_20146rl4i.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/hiDiejb/animal_restaurant_letters_picnic.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/jefobexapulow/malayalam_album_songs_video_2017.pdfIn PDF document text
    • http://xokawetuvon.epizy.com/kowazudaxibikobezuwugago.pdfIn PDF document text
    • http://mobijime.epizy.com/marcato_cookie_press_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/91530084145.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/63183226551.pdfIn PDF document text
    • http://bokakemipik.epizy.com/performance_tool_comparison.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/android_studio_jdk_location_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/9210517584.pdfIn PDF document text
    • http://kasisexa.rf.gd/tftp_server_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/wofax.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_off0000e6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CC 5328 bytes
SHA-256: a7ec220db719663de21dba257743ab4bf29da0ce29aac6f2f8ebdddc54ea2fa0
font_01_sfnt_off0000f909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF909 10804 bytes
SHA-256: 9cbe7dc1c04a25809bccafcf2f1987788a22959af4a2876fa633036ffc80a576