Malicious PDF — malware analysis report

Static analysis result for SHA-256 1366bb46a5671205…

MALICIOUS

PDF

75.6 KB Created: 2021-03-14 08:23:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5807aaa76a745834440153588f116eac SHA-1: 5485be4d203c6670e6b7877c9c93010c31f8b3e3 SHA-256: 1366bb46a56712054b2ea583e1a17bd78590073ae94349a117f9b97ca7b1c0e6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/award?keyword=bridal+chorus+piano+sheet+pdf PDF link annotation
    • https://cdn.sqhk.co/gogojelawov/iZhg4gi/multiplying_and_dividing_decimals_worksheets_grade_7.pdfIn PDF document text
    • http://dexofuzexolan.22web.org/19275365678.pdfIn PDF document text
    • https://cdn.sqhk.co/jivapereb/jegfyie/99395251831.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/b0SiaMv/letivekidinufulivemavop.pdfIn PDF document text
    • http://pejagepelif.iblogger.org/prophetic_seer_anointing.pdfIn PDF document text
    • https://cdn.sqhk.co/fotajoge/jhhvii4/angry_crab_shack_goodyear_arizona.pdfIn PDF document text
    • http://sabawosekedap.22web.org/procreate_update_for_ipad_pro_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/FInggha/max_air_bmx_mod_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudatuvabejosix.epizy.com/blank_tennis_draw_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31c1656-f209-4242-9151-830e85fbb6f8/casio_pathfinder_watch_manual_3043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86ba48f2-a3d6-4ed5-a7cb-f1f0738f7551/suvaburenibavokone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8cc128-726e-41b1-ab1a-572fc8ea7d3d/22774033386.pdfIn PDF document text
    • http://texakotinize.rf.gd/15091873863.pdfIn PDF document text
    • http://vekalaluno.epizy.com/ari_lasso_bcl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba753eb4-6739-44ad-b083-64de41239b52/how_did_you_spent_your_summer_vacation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ba4bda-4862-4b25-9af2-1420c2f888a0/77743369164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c960936-3ea2-47dd-a237-5f961d11df0e/savujobezakoxatufuminuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51847736-d244-4950-8089-c5b04875a749/mobonewuxened.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06eae259-b81f-45c7-8b6a-b95495c8fa7d/70762567385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1e65a8-67e8-4d5d-8bd7-7c6fc1e908b3/kuxozikiwisedadenurojaja.pdfIn PDF document text
    • http://pevedelus.rf.gd/audio_books_48_laws_of_power.pdfIn PDF document text
    • http://kifakodinibem.rf.gd/93012529195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650857e6-c892-41e5-b256-7875a788f5fb/wikovagarete.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_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 5292 bytes
SHA-256: 3fa228c59614fea95f78307828feab17ca6cdb72db876167296b657a396a25e2
font_01_sfnt_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 11796 bytes
SHA-256: 540972f55f5944fba40e8a386c9cd47809a59b7285f253ea0c7d130857761a04

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