Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a9f9646ed30904…

MALICIOUS

PDF

75.1 KB Created: 2021-02-08 05:03:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 92efd0006cd2e3714f4782864b0653de SHA-1: a6405d0b28d18c076fc0e655d3518745a74a76b4 SHA-256: c9a9f9646ed3090405a840f5c684e33a4ca8f3cbb0bdd2694b3d90c8886c2e42
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The document body, though obfuscated, suggests a lure related to a 'Chrome failed message' and contains numerous external links, indicative of a link farm or phishing attempt. The presence of a 'download button' heuristic further supports the malicious intent to trick the user into downloading a payload.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/aws?utm_term=chrome++failed+message PDF link annotation
    • http://pimolala.22web.org/heart_wallpaper_images_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/a9pA8ii/54455124889.pdfIn PDF document text
    • https://xomupufemi.weebly.com/uploads/1/3/4/3/134322732/6c7bb15840dcaec.pdfIn PDF document text
    • https://cdn.sqhk.co/bidamasegom/2icSytT/screen_timeout_settings.pdfIn PDF document text
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/luwuwope.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/hE1t18O/zexeva.pdfIn PDF document text
    • https://sulakupewub.weebly.com/uploads/1/3/1/0/131070695/kamoni.pdfIn PDF document text
    • https://cdn.sqhk.co/xixumobun/lZgeVIc/best_off_road_tires_for_jeeps.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/xjdjdjf/mizimo.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/tubupejevomo/42096336319.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/98141331719.pdfIn PDF document text
    • http://lobosenus.epizy.com/bio_data_form_free_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/56953123836.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/bbc_babies_their_wonderful_world.pdfIn PDF document text
    • http://sasunuvelew.epizy.com/16329506451.pdfIn PDF document text
    • http://vifowas.epizy.com/junoxovekugo.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/assassin_s_creed_syndicate_performance_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/ajedrez_en_linea_apk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2A 4944 bytes
SHA-256: 2bd6e69a88d405bd9b9c1da2d00e01b362ada05ef59ca33ef871ab56fd38341f
font_01_sfnt_off0000eaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF1 11100 bytes
SHA-256: 81f35140a4c859fa3e8cc4219a5054a52b814fe769fc4e0d43eff445d362f503
font_02_sfnt_off0001109f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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