Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5068ffd89176bb4…

MALICIOUS

PDF

72.9 KB Created: 2021-02-26 20:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8c061d36953484bff4ccab29ddcc580f SHA-1: 65950595ebcf5ae75bb8d57b9160a09536f11443 SHA-256: a5068ffd89176bb4c4c0d3533daf5a84603ef3e0b6fac9ef420dcec716db2bbb
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/award?keyword=nordictrack+c990+treadmill+best+price PDF link annotation
    • http://kukikifo.iblogger.org/aristois_1._13._2.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/ijnu2je/beast_bendy_coloring_pictures.pdfIn PDF document text
    • https://zeruxitewisav.weebly.com/uploads/1/3/1/8/131856065/4118b65e7ac1.pdfIn PDF document text
    • https://fuvedomuwipiw.weebly.com/uploads/1/3/1/6/131636935/rulexenolexigi.pdfIn PDF document text
    • https://xonufukagupunim.weebly.com/uploads/1/3/1/3/131384400/gajuvasoxutuj.pdfIn PDF document text
    • https://kikebepuziji.weebly.com/uploads/1/3/0/7/130775256/5eb93a619ad81e.pdfIn PDF document text
    • https://ditaziretuviki.weebly.com/uploads/1/3/0/8/130874055/8010157.pdfIn PDF document text
    • http://kopumiwabetare.66ghz.com/cellophane_fka_twigs.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/jolunenafobuw/dipefisebanikuk.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/bepafumepiwawerof.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/good_verbal_communication_skills_in_the_workplace.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/arnold_schwarzenegger_movies_free.pdfIn PDF document text
    • http://rujujarorimepa.rf.gd/western_digital_my_cloud_home_mac_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/37548236178.pdfIn PDF document text
    • http://tifilumiteva.epizy.com/30647386107.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_off0000e0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C2 5692 bytes
SHA-256: fd1c7822fc4e492ce410b7afe0b5eee0baf3341013837a5eb2f35265fd1a4387
font_01_sfnt_off0000f3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FD 10100 bytes
SHA-256: 6ac36e6f8d52a761f5e94a56dd4fdac3608c8de099edf1f408a9978d800c1d2d