Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5ca6f67a50e17f…

MALICIOUS

PDF

70.7 KB Created: 2021-04-21 15:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5da9406eb94cb19f71490cc14fb460a5 SHA-1: d211aa9c96b38a934846e18e26d976810d29fd1c SHA-256: 5e5ca6f67a50e17fc8fd95019d28fdb977ca3700aa151af6e6adfa20c5a47338
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous links on disposable hosting, further supporting a malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://seumenha.ru/strik?utm_term=how+do+i+reset+my+wayne+dalton+garage+door+remote PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463830/normal_5fcc7fae2098d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450340/normal_603b13e559aa6.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/ibhf4LQ/6188484339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_6012978283b2f.pdfIn PDF document text
    • http://fitokaps.xyz/73697550904f5q4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417040/normal_605f410ac0301.pdfIn PDF document text
    • http://arfesopt.com/87514144995uqc2s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5fe766837954e.pdfIn PDF document text
    • http://repochka.site/51359025311t901o.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/XyXJH0Z/hatchimals_colleggtibles_tropical_party_playset_season_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_6043c1e19992d.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/6NSdDH9/monster_jam_near_me_2021.pdfIn PDF document text
    • http://noksipals.online/walter_riso_librosp9ev9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_601c73cbe166e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_60061152ef0c0.pdfIn PDF document text
    • http://bonboxstudio.com/92617402354rjro6.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/jhhdPCO/best_wheelie_bike_under_300.pdfIn PDF document text
    • https://cdn.sqhk.co/gokitoser/YGh7yzI/control_center_ios_14_control_center.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/75f69321-37d0-44fd-8ca2-84a3ef094af9/how_to_operate_an_intermatic_timer.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_c9b309cc7a1240b798eaaf393f77108a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd6a5ae-10a2-4497-a84d-de082607276f/5th_edition_players_handbook_barbarian.pdfIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_e9c75fc140b84ed79d8917ebceb804c9.pdf?index=trueIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_297d33fb3c5f41a18a34df2da35afdc6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e58dcae2-2f2a-4b13-b867-1f189f844fe4/logiresefuxobeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82456f1d-2c25-4a76-8668-2e9252bdc191/is_dewalt_still_a_good_brand.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_d38cbb1026eb422faa2ba7f796e8ec5c.pdf?index=trueIn 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_off0000d5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DD 5300 bytes
SHA-256: 7db860d4833bdbb6578574bfa024043130c76afaf61a5da6b9ef66828e64f5b7
font_01_sfnt_off0000e7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 10128 bytes
SHA-256: 59a059e2cd2956d3994d4bf19ce8cc72346dde70ef86341c5b12abe579a4703c