Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a97fa5c43e9a6c6…

MALICIOUS

PDF

74.7 KB Created: 2021-03-24 23:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0376731d0ec5e2937c2a9a06348c8f88 SHA-1: 30b459a6aa2697917e85ff6d7692c124ff63309d SHA-256: 8a97fa5c43e9a6c662ee6423d75271535d059fcdfef025992730849028922df9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a lure to download further malicious content.

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://leonvi.ru/award?keyword=bikhre+moti+urdu+pdf+free+download PDF link annotation
    • http://zufoxemudasoso.iblogger.org/sharp_aquos_70_quattron_led_smart_3d_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/hbFfIie/mimpi_gigi_copot_bagian_bawah.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/Tp0vYgj/snappy_lube_waynesville_nc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_6056b036d879a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_603963e89cdb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_603ea02ca1d79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454172/normal_5fc59a6b70d2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_e763d4c1ab354ee283d247db700b2501.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f851624-7d46-4292-a42f-c367b4f2dcc0/eat_right_for_your_blood_type_a_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/mamabininoliviwizuzuwix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95e1bf4-17ff-436c-86de-87824dba34f8/tagegisalidi.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/apc_back_ups_es_700_user_manual.pdfIn PDF document text
    • https://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_ede08cf7a0284887b2e18492f6a9dabc.pdf?index=trueIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_dd2f4b4b4fda42399b3e30718380a284.pdf?index=trueIn PDF document text
    • http://sigadoba.epizy.com/is_there_a_part_2_to_the_darkest_minds.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_fcc9134cdc8e4270a469c26ab6ad16f4.pdf?index=trueIn PDF document text
    • http://pevivudawof.epizy.com/17095242772.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_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 5308 bytes
SHA-256: 5e61944647568159e378831907a4b83fe6b0e9c3024cebe7b982aa0077efe66f
font_01_sfnt_off0000f833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF833 11036 bytes
SHA-256: c126665ab4a700f7058c2b295d73fd5a2131743d6bd556dd1795a1b2643cf754

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