Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e59fc991cb0a9d…

MALICIOUS

PDF

85.2 KB Created: 2021-05-23 08:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c08176cfbbcdc21144d0924a1922d53a SHA-1: 53c141c84743fe07ca14412974b48743ee739078 SHA-256: 75e59fc991cb0a9d1f2b46757700b6e54af0ef8f09100ca9cc3e74d22532209a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://dafemum.ru/strik?utm_term=adnoc+life+saving+rules+2019+pdf PDF link annotation
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/17a684954c39.pdfIn PDF document text
    • https://faporipito.weebly.com/uploads/1/3/4/6/134600592/ladunaxizulo.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/5923732.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/4d716e25aa.pdfIn PDF document text
    • https://fuzifilagowiw.weebly.com/uploads/1/3/4/6/134698760/texim-demaj-zewejefadezis-timaxesavox.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/waseb_batimuwetisawi_kasajufufe.pdfIn PDF document text
    • https://lunogowome.weebly.com/uploads/1/3/4/8/134859941/toxujukolunusawi.pdfIn PDF document text
    • https://xesuxikoju.weebly.com/uploads/1/3/4/0/134095833/7937369.pdfIn PDF document text
    • https://pafovawulawagi.weebly.com/uploads/1/3/4/5/134581771/70d602b46eb2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2eff362-babe-4fb7-8cd2-9ae67d1791fb/pentair_easy_touch_water_temperature_sensor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a865e91-6b28-4763-ac32-59b00b21f5c9/wozosuxijizibusagur.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/aion_legions_of_war_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/is_fine_a_negative_word.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/banner_life_underwriting_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/angry_birds_star_wars_game.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/crazy_arcade_bnb_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/volifol.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/the_mismeasure_of_man_audiobook.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFD 5856 bytes
SHA-256: d7060d1363a36cede1c9f0987c128dc0a74d4a6445a7867f0aae77899e2d7a54
font_01_sfnt_off00012105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12105 10904 bytes
SHA-256: b561b9ec55dd26cfc8254104ed964ef73eafdb85af0da9d87176d29eec777707

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