Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3c7119f94cf954…

MALICIOUS

PDF

68.6 KB Created: 2021-02-19 12:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ae968b2cda064b604c30d6b732d33e79 SHA-1: 3b8d91ec543f7a4785449e603724eefe477cf504 SHA-256: df3c7119f94cf95425ea1af08b6e95b28246a90030d8dfced5f842db860e8aae
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://jottigo.ru/123?utm_term=how+much+does+a+ez+go+golf+cart+cost PDF link annotation
    • http://fuwenosod.iblogger.org/chernobyl_rating_parents_guide.pdfIn PDF document text
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/wufevali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457843/normal_600aba6867266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391008/normal_5fd03cff65129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_601997f3b6ba7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454436/normal_600e417b96de8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419211/normal_5fdfd1dd481b9.pdfIn PDF document text
    • https://ninafaguri.weebly.com/uploads/1/3/4/5/134592808/1a1927e0.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/befafuni/dodapajepuki.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/1509041917.pdfIn PDF document text
    • http://pabovabavuwemet.rf.gd/the_pact_book_jodi_picoult_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/vovajija.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/47929220426.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/81003353204.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/womapunenaga.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_off0000cec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC5 5540 bytes
SHA-256: a867348e2a8c43ffa0c554ff43e81cdf311c362e60d527acbaf377bb73fb396c
font_01_sfnt_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 10556 bytes
SHA-256: 6395e225c7384c64e67360e736c7bd2ebe64d1422b272b221370d399ce6c32c5