Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c97704373f0f178…

MALICIOUS

PDF

74.1 KB Created: 2021-02-21 11:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 58a952dd50f6d4f49d2703878354eb19 SHA-1: 75ae5388bd326323afe07eb5e7e3c9f1878c2c7b SHA-256: 1c97704373f0f1787f97b0514e2539b588f1aacd34293d92747718410b9515a2
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/aws?utm_term=how+to+adjust+the+carburetor+on+a+mantis+tiller PDF link annotation
    • https://cdn.sqhk.co/nokikijun/gdigiT9/download_bouncy_seed_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5fdacffb4e63c.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidofajug/A0qiagg/rapunzel_dress_up_girl_games.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/luzesejorega-pemonorajar.pdfIn PDF document text
    • https://mufogijagojar.weebly.com/uploads/1/3/1/0/131070489/liduxowimeduki.pdfIn PDF document text
    • https://cdn.sqhk.co/gatutojuse/RP7lCar/guess_the_flag_sporcle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_5fd19c5dce20f.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/bgg5gfe/best_3_star_army_clash_of_clans_th8.pdfIn PDF document text
    • https://cdn.sqhk.co/boketumejipa/jqjj0IX/iphone_x_ringtone_very_low.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370286/normal_5fc9b681cfc51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469128/normal_600b6ac7e5ec8.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/tdgj1hb/zezafavaxukafasavas.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/kujesulad/vipovinubar.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/4087720748.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/58880035071.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_off0000e3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EB 5448 bytes
SHA-256: 84f8149a7c3799ba42c494b6776bd8b391ff32a7d7a360ee4f026a13ec35c8f6
font_01_sfnt_off0000f658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 10764 bytes
SHA-256: 31577138a69e7f48163ac9a278e14bbd26dbeee7d23cdd2421485c61e655c694