Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01b2e62359e1ff6…

MALICIOUS

PDF

68.2 KB Created: 2021-03-04 05:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b3896e61e299d151b96d81727837eb77 SHA-1: 7b51ca78b8149552617ea4147e3e3ea476529df7 SHA-256: e01b2e62359e1ff6d8cd6d9a134688090e5c40c8d58bbeb988b93090493e0570
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though partially garbled, suggests a lure related to landlord rights, directing users to a suspicious URL. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or scam campaign.

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 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://golowaki.ru/123?utm_term=what+are+your+rights+as+a+landlord+without+a+lease PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384046/normal_5fe8fd407af02.pdfIn PDF document text
    • https://moworanapubo.weebly.com/uploads/1/3/4/6/134685821/2431636.pdfIn PDF document text
    • http://jezuxomedoz.iblogger.org/venobiwipuxesipimowetos.pdfIn PDF document text
    • https://gazewowotom.weebly.com/uploads/1/3/4/6/134616189/jusurokufofufakuzura.pdfIn PDF document text
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/16445.pdfIn PDF document text
    • http://kmikaerfs.ru/5537989068250t3e.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/monuvisibmxe2.pdfIn PDF document text
    • http://leafester.online/huawei_p30_pro_software_updatecamyt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480387/normal_6032db9ed933a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_603b8f14e5b23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lazuvuvopa.epizy.com/what_are_the_4_most_common_elements_in_living_things.pdfIn PDF document text
    • http://silinodev.rf.gd/shayne_ward_breathless_mp4.pdfIn PDF document text
    • http://saninov.epizy.com/mozilla_addons_helper.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/61127285338.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/beowulf_online_book.pdfIn PDF document text
    • http://tozurome.epizy.com/kukaruxipinowi.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/samodubek.pdfIn PDF document text
    • http://gemesiwexalizel.epizy.com/baidu_root_2._3._7._apk.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_off0000cf80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF80 5292 bytes
SHA-256: d2643c33d40bdb5650cba1509671dd68f85d333387765be3f69b68e8b65b101f
font_01_sfnt_off0000e193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 9864 bytes
SHA-256: e2c1c6770ad50693e72893b076c3887e67ac328991c8f6a08869c1847b49587a

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