Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d98856d1068e873…

MALICIOUS

PDF

75.8 KB Created: 2021-02-07 09:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9c3cbf3cf449e8ead39b17e45960b4ac SHA-1: f04da76784be9d602a8e95d9dbf82f14aa7488a0 SHA-256: 4d98856d1068e873b587d22af000422d199ff629e67a47374a29d298f453df4a
196 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
  • 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://jottigo.ru/wb?keyword=chinna%20mani%20kuyile%20video%20song%20free PDF link annotation
    • http://emmetrix.net/monohybrid_genetics_problems_workshepmpia.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/0YG7a40/planetside_2_shattered_warpgate_review.pdfIn PDF document text
    • https://vexepagofebove.weebly.com/uploads/1/3/4/8/134866030/8563496.pdfIn PDF document text
    • https://durosokikiw.weebly.com/uploads/1/3/1/3/131379956/928540.pdfIn PDF document text
    • https://zolaverapudo.weebly.com/uploads/1/3/0/8/130874102/7c798ea061919b.pdfIn PDF document text
    • https://lulotabo.weebly.com/uploads/1/3/4/7/134745182/a25fd79.pdfIn PDF document text
    • http://rubeatyshop.xyz/mogipurewawidaromigipub05xgy.pdfIn PDF document text
    • https://zikawudewodag.weebly.com/uploads/1/3/4/5/134585044/3890036.pdfIn PDF document text
    • https://gopilabuvimira.weebly.com/uploads/1/3/1/4/131453416/jedakupizamo_kudifu.pdfIn PDF document text
    • http://copyrighytsupport.com/6843424823w3gqm.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/bajuse/29207057969.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/us_highway_41_traffic_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/norobunutinijuviloze.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/fekifukenofitukotixed.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/box_culvert_design_spreadsheet.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_off0000e96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 5452 bytes
SHA-256: 2609a1e89fe2f2e8ea4f19e30231591e433b4637415eb2852396fc25858fe00b
font_01_sfnt_off0000fbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 11408 bytes
SHA-256: 9a54f2842af66e350b0c77ca504332af4f2395c33e957257f1daa034b31264b3