Malicious PDF — malware analysis report

Static analysis result for SHA-256 183dfb0f78bc7bb4…

MALICIOUS

PDF

69.4 KB Created: 2021-02-10 15:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c28085f3010fc91d253e1f605f013175 SHA-1: 65c9f343089095afc9a60a192f6aadec552d0b14 SHA-256: 183dfb0f78bc7bb4671262da27aa7d4744e0cafa2eb68d11c443c3444535ba2f
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/aws?utm_term=huawei+android+9.+1+frp+bypass PDF link annotation
    • https://xibuderopugef.weebly.com/uploads/1/3/4/0/134042602/971d14f5826066.pdfIn PDF document text
    • https://zivotawab.weebly.com/uploads/1/3/4/5/134576919/mevale-wekadokijes.pdfIn PDF document text
    • https://giximanuv.weebly.com/uploads/1/3/4/5/134526051/wojutezasum.pdfIn PDF document text
    • http://vnds-super.space/23820452552189gu.pdfIn PDF document text
    • http://gratoramaa.space/notagalanadajodijopumus6gok6.pdfIn PDF document text
    • https://gijopufiri.weebly.com/uploads/1/3/1/3/131384250/7176091.pdfIn PDF document text
    • http://vidapabil.22web.org/97673737484.pdfIn PDF document text
    • http://fudipowituvu.22web.org/leronivakoxavegoxirefedu.pdfIn PDF document text
    • https://cdn.sqhk.co/sulubejes/QhhbiaP/mountain_bike_shoes.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/xefezesebusu/half_inch_nylon_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/bihari_babu_song.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/julavop.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/lezerevadarawomigu.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/gangster_town_game_for_pc.pdfIn PDF document text
    • http://firasakujataj.epizy.com/83487440223.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_off0000d2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B5 5540 bytes
SHA-256: ca8b2b36d725205cf99d3da100a44ad6ff560f09b46566536efb3c808ac8c31b
font_01_sfnt_off0000e5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 10224 bytes
SHA-256: d22e46ff04e24ec38125119d653832d253085ad93f8ba4d7c6fe5111de7c57cd