Malicious PDF — malware analysis report

Static analysis result for SHA-256 226bfdf3f3234a48…

MALICIOUS

PDF

70.9 KB Created: 2021-02-06 00:07:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 2a069a3df77da36cd99acc06c9ba0e0b SHA-1: f756466b3fdd8ff31dc44975903988b842e5bdbc SHA-256: 226bfdf3f3234a4879c5b92c490fbe96003e38a31bab9a2069d820b3c2cdd41a
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=sql+server+2017+reporting+services In PDF document text
    • http://circleshtang.xyz/xu_n_nh_cc_truyenfullngmb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448343/normal_60118977d2339.pdfIn PDF document text
    • http://ludshop.xyz/19473846560nu0w7.pdfIn PDF document text
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/ratovarene-judixi-deriga-mavana.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/6664433.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/xaxixelenobikuj.pdfIn PDF document text
    • https://newimogo.weebly.com/uploads/1/3/1/0/131070302/xupazevete-wiluga.pdfIn PDF document text
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/f3ec7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475874/normal_5fe19372734ec.pdfIn PDF document text
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/7161944.pdfIn PDF document text
    • http://kufemotobenin.66ghz.com/xufugirosikijenexesusa.pdfIn PDF document text
    • https://tovunebutulewe.weebly.com/uploads/1/3/1/8/131871744/gajiwajatekalabezon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_601cb730ed01c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5fe62b938e6b6.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/wexoteluwag/7279154721.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/uscis_citizenship_form.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/avernus_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/jamurazevosifelorilak.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_off0000d555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD555 5588 bytes
SHA-256: 1c1991060d9b283f851f05046379bc2c62a3683c6f59d7f4780925a75ebaa984
font_01_sfnt_off0000e87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87D 11152 bytes
SHA-256: 070559ecf2e7d66ca13c9faa6654e190643bbc31fcb25e324c5406d25311092a

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