Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07fc97dcc357160…

MALICIOUS

PDF

69.5 KB Created: 2021-02-28 20:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 18cb30ab737648135c1bf0a22f4cc112 SHA-1: d27d2334f93925e51884a23559c9baddc67868e1 SHA-256: d07fc97dcc3571605769249cb7351f8cbe37ea047e730962a79c631f19dc442f
254 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
  • 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/award?keyword=how+much+does+a+pawn+shop+make+a+year In PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/xemugap.pdfIn PDF document text
    • http://com-signto6.xyz/869496090272skpn.pdfIn PDF document text
    • http://rameautbxy.space/3669259074hcv3y.pdfIn PDF document text
    • https://dugepenen.weebly.com/uploads/1/3/1/3/131379306/dobaz_dalagubu.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/wazib.pdfIn PDF document text
    • https://vakitisize.weebly.com/uploads/1/3/4/0/134017930/5971b120e1.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/jidagafinuxesu/6522374904.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/83619186195.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/86284086419.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/how_to_thread_a_singer_athena_2000_sewing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/99212879567.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/small_baby_boy_pics.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_off0000d492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD492 5500 bytes
SHA-256: 806fce9ae099be5add74657f4e53566f969d1a5e46893db188da4af886ba0fed
font_01_sfnt_off0000e733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE733 9984 bytes
SHA-256: 251b939ad33b98930b45d499bd77eb180714a6575a2f482b398318376999534e