Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5224251aea33d15…

MALICIOUS

PDF

69.5 KB Created: 2021-02-21 17:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e76c91c33b9f28fb472c4b18150e4803 SHA-1: a8baea1e35e15101d152102baf4f50a5b441ed47 SHA-256: b5224251aea33d156db9901148f5e2216d29c91e846889bc320e200cd4fa96f8
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://crophysi.ru/wix?keyword=boy+scout+troop+guide+training In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366040/normal_5fcbd6321409f.pdfIn PDF document text
    • https://vutameko.weebly.com/uploads/1/3/4/5/134576445/dijutafijoj-wiforuxoj-daviniwotelusi-wezowob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373997/normal_5fe143123ab8d.pdfIn PDF document text
    • https://xuzimelo.weebly.com/uploads/1/3/4/1/134132070/vejefujawetomid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459470/normal_5fee81337e314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410418/normal_5ff964b3ef3e8.pdfIn PDF document text
    • http://paxebuli.iblogger.org/dafidukiberulejam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446921/normal_6004b437901f1.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/3151357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5fda8579d81a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413238/normal_5ff580948d56b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxegumulot.rf.gd/32215616551.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/acdsee_pro_6_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/tivetupurukopufek.pdfIn PDF document text
    • http://watijosanowo.epizy.com/12801957268.pdfIn PDF document text
    • http://zezibinevuzeliw.epizy.com/cisco_firepower_2130_guide.pdfIn PDF document text
    • http://bejopirobi.epizy.com/47879425823.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/construct_3_templates.pdfIn PDF document text
    • http://jeputujakajaj.epizy.com/tujasimawod.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_off0000d348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD348 5360 bytes
SHA-256: a2408e8b3096946b3d53f59611990d35c1baf5822e2db2243f6ed8563d3a0c07
font_01_sfnt_off0000e59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59E 10440 bytes
SHA-256: c3d90be6d3125039c96e599141b9510b2c4afc20b7d109fef0dc65d6023cc2b9