Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14862ea9e6edfe9…

MALICIOUS

PDF

71.1 KB Created: 2021-02-17 00:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cb16f022564d08110facef1a357b6db9 SHA-1: cf14da98fe20c652d32df77573ae333c45c810de SHA-256: b14862ea9e6edfe9d9f635ab9276d8e5c4c3bd0f1fcf36c9282580d279693858
196 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/wix?keyword=geotours+workbook+instructor%2527s+answer+key+pdf PDF link annotation
    • https://motadonikedubi.weebly.com/uploads/1/3/1/8/131856170/2f0d78e5118b.pdfIn PDF document text
    • https://nexuragero.weebly.com/uploads/1/3/4/7/134751893/fomajikexepetowu.pdfIn PDF document text
    • https://dotijude.weebly.com/uploads/1/3/0/7/130740148/xezaluwonek.pdfIn PDF document text
    • https://likunemotiro.weebly.com/uploads/1/3/5/2/135299998/6172880.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/idEifig/dexanitobasokawegomaxusej.pdfIn PDF document text
    • https://jokikisiva.weebly.com/uploads/1/3/0/8/130873994/tovumixebolusej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490121/normal_6016c3aad8d49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lomuper/bayer_aspirin_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/xebonopuroruru.pdfIn PDF document text
    • http://tininababa.rf.gd/31603902400.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/62757074960.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/33178422566.pdfIn PDF document text
    • http://vulevusevugola.epizy.com/19363232428.pdfIn PDF document text
    • http://xevorerokune.epizy.com/26003699191.pdfIn PDF document text
    • http://vekoxoke.epizy.com/4th_grade_math_worksheets_multiplying_fractions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE7 5460 bytes
SHA-256: 24d52910a011e97dcde048214e8a8e4436a1a1dcd7b71af96499aaa98d6bccd8
font_01_sfnt_off0000deaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 10104 bytes
SHA-256: 9140f26abd700787932104b25688c3587efff9f4665073d57199c8d704a48a33
font_02_sfnt_off0001010e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333