Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b40c8ed50bd1c9…

MALICIOUS

PDF

77.4 KB Created: 2021-03-29 17:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 85943201b61301f6c6ebf1123d66e19f SHA-1: 0b459774139a0fe57d22d50bf31196885a9726d6 SHA-256: 49b40c8ed50bd1c93483caa5b23ffc59fd247b555584e022eef2112690174ce4
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-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.
  • 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://jumiwimov.ru/wix?keyword=discussion+questions+for+the+great+gatsby PDF link annotation
    • https://divoguwobumiwes.weebly.com/uploads/1/3/4/4/134487338/2675043.pdfIn PDF document text
    • https://munulibur.weebly.com/uploads/1/3/4/5/134508804/lexidod-powosupoketizib-pinupewovelegez-mimijibani.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/ihjivrl/1335487671.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/T1cj3je/best_decks_in_standard_hearthstone.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/bjhB6TH/77073373076.pdfIn PDF document text
    • https://notojusuwetu.weebly.com/uploads/1/3/1/8/131871856/68365ebb4e739ee.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/nL7bbif/jalatesunos.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/VtfoXhb/mortal_kombat_11_ultimate_ps4_amazon.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/5d53f330-80e3-49aa-91df-3d747988c744/epson_wf-2540_linux_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/konoloteri.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/oxford_english_dictionary_history_of_words.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/interior_design_school_in_savannah_ga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42bd3699-8dda-4cfe-9feb-889950a3353c/best_mechanical_keyboard_for_gaming.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/video_helper_safari_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/28533025072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a0a744-ebb9-4a8c-bdaa-08b7b4d666fe/snow_white_and_the_huntsman_castle_real.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/estado_calidad_aire_bogota.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/nowavenutavazifudunu.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/56918748089.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_off0000ef00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 5480 bytes
SHA-256: a1b9d7a1f69259cc7ac74405520ce9c200e4446f6b1948e1b1919646c79bda64
font_01_sfnt_off000101b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B0 11336 bytes
SHA-256: 8b762d626ce017708c1f1043b14c24770f29954932f972891017270c6ee21a1e

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