Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed23b71772d5e2e…

MALICIOUS

PDF

76.3 KB Created: 2021-02-28 19:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0181194ff724ba6727f1fe36276a118c SHA-1: de024b62fe8c41c8ea082e21bd0312036df86daf SHA-256: 5ed23b71772d5e2e88e06ca183c68e68b58c883838451a50a4de840c68f680d6
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to a product review, likely intended to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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=bose+acoustimass+10+iv+review PDF link annotation
    • http://xoziduso.mypressonline.com/colt_ar15_pistol_lower.pdfIn PDF document text
    • https://sowefitubi.weebly.com/uploads/1/3/1/4/131406610/9455245.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/f54hhhx/jalagul.pdfIn PDF document text
    • http://lagujegivupani.22web.org/wivilivumam.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/how_to_play_camcorder_cassettes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473622/normal_6009622461517.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/at1jehh/novelfull_app_download.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/how_much_does_a_construction_manager_make_in_california.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/31450580138.pdfIn PDF document text
    • http://bepegut.iblogger.org/eighth_grade_math_minutes_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497695/normal_5fe654bf11c9a.pdfIn PDF document text
    • http://dobafeser.66ghz.com/xifupebubutesek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480728/normal_5fe79d2080f2d.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/x9jh5jg/66706195981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495265/normal_60183843a00d7.pdfIn PDF document text
    • https://zanomegujinax.weebly.com/uploads/1/3/4/8/134873542/zufonagusadagol.pdfIn PDF document text
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/muzukine.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/Hjcjagi/sidaka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/55063529653.pdfIn PDF document text
    • http://litorow.myartsonline.com/cub_scout_bowling_pins_pollard.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/17682831422.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/xafutikodazatotarosabites.pdfIn PDF document text
    • http://tesoxukezeziles.epizy.com/mobogenie_app_free_for_android_tablet.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_off0000ec16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 5308 bytes
SHA-256: 474ae2dfd7223343e10fed32fbf037f12550450a7f40be5ebc274469f6927383
font_01_sfnt_off0000fe26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 11196 bytes
SHA-256: a76a4476d2fe99b305837e4f86f2144331282ff4194747429697a24b4d57cbd9

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