Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1da9cc0211c1c9c…

MALICIOUS

PDF

69.0 KB Created: 2021-02-23 16:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 156db2caea6578efbb0d3007f74007ff SHA-1: b13f29de2c3a9b690d0162216490feab792b4b01 SHA-256: b1da9cc0211c1c9cf0b7fa0294015d8fb8a24b588245d1758c1efa58eb891f32
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=gmc+terrain+owner%2527s+manual+2015 In PDF document text
    • https://cdn.sqhk.co/disonixures/jfhjhjd/vimogupupilafoveloremapa.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/dgchcj5/red_ball_4_stage_54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379231/normal_60062a51991a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_601bb151d41c6.pdfIn PDF document text
    • https://gabanifuvumot.weebly.com/uploads/1/3/4/5/134588994/piwaletuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5fcc5bedc7075.pdfIn PDF document text
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/koxukiw-ronirutesif-kisobemugewizej-konupu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383801/normal_5ff0dc8d7def4.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/hwcjgMm/sony_controller_apple_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490364/normal_5ffcfda9a3f0d.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/i3Lhbbr/aaron_donald_height_and_weight.pdfIn PDF document text
    • https://vekukedabil.weebly.com/uploads/1/3/4/7/134710008/mozemotafarodud.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/jjeiful/gamers_wallpapers_1080p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5fede1b73a25a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369657/normal_5fc7df45295ad.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/vuterijoze/lafajiredaritagiwovifeveb.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_off0000d0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 5552 bytes
SHA-256: d96b77c0a0c601cd92abafe10fce3a82a52ddbd8ca18ca1e7087a5bc080b8b18
font_01_sfnt_off0000e3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C9 10200 bytes
SHA-256: 1600ea469e8d5785f629d554690294caf603ddbde9529605fd6dcae7c4516a77