Malicious PDF — malware analysis report

Static analysis result for SHA-256 0244a4537dd3e8b9…

MALICIOUS

PDF

76.5 KB Created: 2021-02-22 15:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 27dbf25595bd6780ee209b93c2703c8e SHA-1: 9287fad1e04df746eec6e45e67e3457f39b05aa2 SHA-256: 0244a4537dd3e8b90dbabf53b7fff81c7f1d77253c3ad47c48bd39db865b8186
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://maypoin.ru/123?utm_term=whirlpool+refrigerator+ice+maker+repairman PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460231/normal_601d191d76481.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478408/normal_600812a75300e.pdfIn PDF document text
    • http://momentikshop.space/are_wolf_appliances_reliableklwjh.pdfIn PDF document text
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/8410328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455673/normal_602a284e9df91.pdfIn PDF document text
    • http://trackengine.host/pi_coresight_user_guideauh25.pdfIn PDF document text
    • http://tehnotop.store/standard_format_of_independent_audit_reportj2r3h.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/ecology_lab_report_example.pdfIn PDF document text
    • https://fumuzuwuwuwupu.weebly.com/uploads/1/3/0/9/130969925/2327029.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/magutuwuvozalefuvofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486221/normal_5fd67d786b9d2.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/zoluwivebiro/latili.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/atypical_subtrochanteric_and_diaphyseal_femoral_fractures_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/queen_bed_comforter_and_sheet_set.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/40268767969.pdfIn PDF document text
    • http://zaninenuj.rf.gd/cookie_sheet_pan_dessert_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/sla15_genie_lift_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/braille_keyboard_android.pdfIn PDF document text
    • http://xegivitusok.epizy.com/good_food_review_samples.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_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 5328 bytes
SHA-256: afdb30d6e12dd243a0520ffe9ebcf5b4b0f52ef2eef6231055b4b2488f935722
font_01_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 9900 bytes
SHA-256: 2a0732952bbada0789550b317bdeab73dd4838a8b6f4088c6e8f343f8c28dacf

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