Malicious PDF — malware analysis report

Static analysis result for SHA-256 b810cec2db8cfe56…

MALICIOUS

PDF

67.1 KB Created: 2021-02-19 03:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 85d9c12a80a04fc75fd9faf1c9817921 SHA-1: d37708d2869f600d95576fdf3bb0b2ccf073af8a SHA-256: b810cec2db8cfe56ce6dea8379594472fddecf62c5a4dd9d05e71cae49c778e7
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=1995+jeep+grand+cherokee+fuse+panel+location In PDF document text
    • http://todayit.pro/877843083203n5ef.pdfIn PDF document text
    • https://bodonovovo.weebly.com/uploads/1/3/1/6/131607174/pemigiwukoxaveg.pdfIn PDF document text
    • http://hookup153.space/pharm_phlash_3rd_editionb9d4p.pdfIn PDF document text
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/bilajojilebatote.pdfIn PDF document text
    • https://sowurudiz.weebly.com/uploads/1/3/1/4/131438308/tizinemurerexarezof.pdfIn PDF document text
    • http://podcard2020.site/dotolwtney.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doroxepazu.epizy.com/nespresso_machine_descaling_guide.pdfIn PDF document text
    • http://wafidifu.rf.gd/vutomatusiwewinofoz.pdfIn PDF document text
    • http://penabak.epizy.com/xexonig.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/rudikirofebiluvuzejipurox.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/wow_bfa_affliction_warlock_pve_guide.pdfIn PDF document text
    • http://worurekebisur.rf.gd/xebofabawifozomiwejovope.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/handwriting_worksheets_4th_grade_cursive.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/2012_chevy_malibu_manual_shift.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_off0000c908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC908 5796 bytes
SHA-256: 932c5305189313ff10347c990cdea15dbffe5a1e3ee06c80374a47b2fbc93ffb
font_01_sfnt_off0000dcd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 10192 bytes
SHA-256: fdecded878d4a58b65acd0a858c894fe52a1200f7b19d54dcca33a42767af820