Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b89c17cd57197c…

MALICIOUS

PDF

63.1 KB Created: 2021-02-14 23:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 589d456e084b10aa2c120601b61d48e9 SHA-1: 1ce3d2cb2164d74bf7973998bea28c988f53e552 SHA-256: 44b89c17cd57197c76a9b0c70e58fe6828f2533d49a74847f91fe91bd6676a78
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=two+digit+borrowing+subtraction+worksheet In PDF document text
    • http://romeital.space/tuwapabibifcjc7r.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/igieMhf/xubiwalagaguz.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/fIigdpp/smart_fluorescent_tube_lights.pdfIn PDF document text
    • https://semotifivunadi.weebly.com/uploads/1/3/1/3/131380295/bcc24e.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/KkieeHV/jodatimojuxavut.pdfIn PDF document text
    • http://idealslimitaly.site/25269668206oq8j7.pdfIn PDF document text
    • https://cdn.sqhk.co/towojutal/ajaPgjd/ian_dury_and_the_blockheads_wikipedia.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/jdgfkhd/64405737567.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/1ZHjgha/91238782037.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/wuniku/algebra_1_linear_equations_worksheets_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/40724358326.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/ad_free_voice_recorder_android.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/gogiregizuribuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/76606272606.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/57635889287.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_off0000bb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB1A 5416 bytes
SHA-256: 722cfdb469010bfb102c198fbd6f3653f520d6d80e1afcc8093e11c6b3cf61f9
font_01_sfnt_off0000cd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD91 9880 bytes
SHA-256: 94890a966d4f4fd262a13434a0ab86b6245e03cfc6f1853fb4a1b3eecaa3b646

Open this report in the interactive analyzer, or submit your own file for analysis.