Malicious PDF — malware analysis report

Static analysis result for SHA-256 283f250f3536b9c2…

MALICIOUS

PDF

65.5 KB Created: 2021-02-13 07:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a83b6d11de9ebb7ea17e84f037e02734 SHA-1: c050155d1fa0e5d72ae3dbea9bb42df11d6cb634 SHA-256: 283f250f3536b9c279f0b43b7e86e14dc2c6b63f7cf2d2dca222a77950589652
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://baarspo.ru/wb?keyword=shankara%20mahadeva%20dj%20remix%20song PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426828/normal_60091482caa58.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/walige.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/a5802ace6fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491410/normal_5ffd986b5aa01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445750/normal_5fe27c74a2a50.pdfIn PDF document text
    • http://zosujobitusup.iblogger.org/14847246890.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483388/normal_6007f441403e7.pdfIn PDF document text
    • http://gexedufez.22web.org/11611061163.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wepirizifomonij.epizy.com/35372154473.pdfIn PDF document text
    • http://galexuduxegi.epizy.com/sanukukej.pdfIn PDF document text
    • http://riberudedanute.epizy.com/bwv_29_dupre.pdfIn PDF document text
    • http://tunivepusage.epizy.com/92452691653.pdfIn PDF document text
    • http://wudobew.epizy.com/pelisuzo.pdfIn PDF document text
    • http://gidepajujida.rf.gd/academic_word_list_coxhead.pdfIn PDF document text
    • http://vabopegimunufet.rf.gd/teres.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_off0000c0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BC 5576 bytes
SHA-256: 9fea85c35516928cabb5d09c5a71c6d927d0863dd16510a187f4f89aa7469cdf
font_01_sfnt_off0000d398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD398 11040 bytes
SHA-256: 5d1180c8626ca2dc419bb93ca6a86fe04171fdc1d0b59e56966faa1ead18303c