Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7a216bfee54ee1…

MALICIOUS

PDF

72.1 KB Created: 2021-02-20 03:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4824ec07b4b10025f75d7646d03498f0 SHA-1: 3aa65f5467e7cc31e2ce486698c27b393bb1f921 SHA-256: 5d7a216bfee54ee1277c57cd11f9a59d3b1b32502bdffd8da26000a879bcdb6e
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://jottigo.ru/123?utm_term=evenflo+nurture+car+seat+installation PDF link annotation
    • https://gojupisot.weebly.com/uploads/1/3/4/0/134016698/javidose_kaxijufuzubez_firixelilep_tijomerasusuga.pdfIn PDF document text
    • https://nanupubixo.weebly.com/uploads/1/3/0/9/130969545/4f6b324e8d.pdfIn PDF document text
    • http://rululidevasuv.22web.org/stars_coming_out_of_box_braids.pdfIn PDF document text
    • http://secret-empire.ru/89489513104so96t.pdfIn PDF document text
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/1658545.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/6167216.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fekerudosepu.rf.gd/mekanisme_terjadinya_pingsan.pdfIn PDF document text
    • http://bepowawon.rf.gd/how_much_is_echo_dot_2nd_generation.pdfIn PDF document text
    • http://goxakimolo.epizy.com/pabudutajofanelunafejoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/40909641438.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/37936883357.pdfIn PDF document text
    • http://sotexazonilot.rf.gd/apple_developer_software.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/the_conference_of_the_birds_ransom_riggs_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/55777312909.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/98247419261.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_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 4892 bytes
SHA-256: cfecfaa54585a9033544df0d1046fa64b25d652030c2e5c906ab736f8b520666
font_01_sfnt_off0000effe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 10428 bytes
SHA-256: 3cbbb0e01de056dadb2608e6e653d6b1ffce205b9593e0f8738ad96f6cec672e