Malicious PDF — malware analysis report

Static analysis result for SHA-256 765b67fb800a810f…

MALICIOUS

PDF

99.0 KB Created: 2021-03-27 15:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a6d13d819dcff9965724431d041b6750 SHA-1: 0ae588d43dcc4de78a88a008b5aaa7796dfa96b2 SHA-256: 765b67fb800a810f1cb2221b468f8647225ff6adb2527b3add53774de03bd281
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external URLs. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or distributing malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/wix?keyword=ghostfreak+vs+ben+10 PDF link annotation
    • http://soxezujep.iblogger.org/wixev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476446/normal_5fceef3298e2a.pdfIn PDF document text
    • http://pevojatinolotej.22web.org/futolarivisizujalemu.pdfIn PDF document text
    • https://lukafove.weebly.com/uploads/1/3/4/6/134655473/jitawajarepolinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393900/normal_6056b902278c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392868/normal_5ff5cdf7aa122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493579/normal_60589a07b448d.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/xoburefomabukasar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485568/normal_5fdb915ca4c15.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/lasidamojujo.pdfIn PDF document text
    • https://sejusidanixaj.weebly.com/uploads/1/3/4/3/134374441/1012515.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_d648f3fedbd2447595ab1c7f4838ed51.pdf?index=trueIn PDF document text
    • http://xamijofut.rf.gd/ninimubumalaganunebobum.pdfIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_8fd824aff7a14f9eae479c51cba19c13.pdf?index=trueIn PDF document text
    • http://maviwapas.epizy.com/98426624034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72639df1-6cbc-40fe-87cc-5c62f80573f5/62440110695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5ec03a-6184-4d58-a54a-63d20077a9c8/taylor_digital_weight_scale_reviews.pdfIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_f1788dd20b934fdfa45a3f3f21f0ec0e.pdf?index=trueIn PDF document text
    • http://nozosikela.rf.gd/lebodijid.pdfIn PDF document text
    • http://beviraveda.epizy.com/1_year_old_baby_food_guide.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_1888b4b05a18487b96146ce0532f7043.pdf?index=trueIn PDF document text
    • http://donovebar.rf.gd/application_format_for_job_in_bangla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ba248c-0d79-44a7-86c2-4c499f9da5e0/does_the_lexus_is300_have_a_2jz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab34590-e2b7-458f-b0f6-7111e6e201f2/vuzuxesobupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034733ee-8698-4b1c-bb15-f47c373ca24e/database_management_system_objective_questions_and_answers.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016484.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16484 17180 bytes
SHA-256: e1ccff5723f55e9fffbfcd3fea34b0660d62f4621e5a6656e9d6d4cd654e0aeb
font_00_sfnt_off000110df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DF 4952 bytes
SHA-256: dde88f9d93b9cead6d59c21dad584228e3be6314badd1b1c8ae061156f1c0a2b
font_01_sfnt_off00012269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12269 5312 bytes
SHA-256: 6f9b2020f1aa6ce06a44848e186def283c29fdf3239d8bacd5217874ecf3525a
font_02_sfnt_off00013481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13481 15484 bytes
SHA-256: 8d9d63a76cd4b4ee9a51f42df2b34542fcf27659c0dab082e78455b9eade2ff7

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