Malicious PDF — malware analysis report

Static analysis result for SHA-256 2797ab1f3f55a14f…

MALICIOUS

PDF

73.1 KB Created: 2021-02-12 20:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8f47cda9d3461274796cb55e2d0232e4 SHA-1: 450f8811d6fe19a7379ddffa51e6f099921ba768 SHA-256: 2797ab1f3f55a14fc057116c893a9649629412499a9ef71c01b79020fb113217
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/123?utm_term=honda+element+camper+mods In PDF document text
    • http://inostrana.com/48730575569c6ha.pdfIn PDF document text
    • https://tedinuvade.weebly.com/uploads/1/3/4/3/134348171/7266411.pdfIn PDF document text
    • https://liroxinumapidaz.weebly.com/uploads/1/3/5/3/135348088/verafi_fodapuv.pdfIn PDF document text
    • http://favanitum.iblogger.org/doodle_god_full_game_free.pdfIn PDF document text
    • http://presentinsta.online/vefazaf2wzoc.pdfIn PDF document text
    • https://xopavomubikun.weebly.com/uploads/1/3/4/8/134879687/palebe.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/tasufagijaremo/79930760168.pdfIn PDF document text
    • http://wuwinot.rf.gd/zadizasatowigabutupoj.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/18606081765.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/answers_for_math_hw.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/nvidia_graphics_card_2gb.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/27755251428.pdfIn PDF document text
    • http://bugudejekizukem.epizy.com/portugal_the_man_woodstock_free.pdfIn PDF document text
    • http://julepudelixi.rf.gd/45243250590.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/85558372045.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_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 5180 bytes
SHA-256: 184b50e08c542bbf9beb2fcae00eb0d34761011ebff2f63d2aecc066feaddc73
font_01_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 10724 bytes
SHA-256: 481b76d3f5b3af77d1801e43c9bd2c6a1f04c5a154f5ca4accce5a068e842bcf