Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1d6369a524f72c…

MALICIOUS

PDF

76.6 KB Created: 2021-03-25 14:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9d3e6d24c77f46cc054864be4f7bdff7 SHA-1: 7970c5a5284930c76be585560a9be49d0a38e646 SHA-256: 8d1d6369a524f72c477e280415ef1b6f89f4d8ad6e4b6911551378487e9fe8be
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=what+is+the+difference+between+director+and+deputy+director PDF link annotation
    • http://lianhua.life/alive_the_story_of_the_andes_survivors_by_piers_paul_readtkks4.pdfIn PDF document text
    • http://sodahq.club/921056272899cbco.pdfIn PDF document text
    • http://muvibigi.22web.org/27593211875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_6014438e2d8ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446635/normal_6057ada65f4e1.pdfIn PDF document text
    • http://lazadacostumercenter.com/white_fang_of_the_leaf_hokagel62x1.pdfIn PDF document text
    • http://lajalura.22web.org/intermatic_light_timer_model_ej351.pdfIn PDF document text
    • http://xunogivovere.22web.org/nejevagijilunof.pdfIn PDF document text
    • http://copyrightproblem.com/xuguxavolefesll0z5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494673/normal_604a45192c55e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_6033633d5bed6.pdfIn PDF document text
    • http://konobemozitu.iblogger.org/zexukudub.pdfIn PDF document text
    • http://keysecret.ru/popuvdx3ex.pdfIn PDF document text
    • http://losamaresufalu.22web.org/bovomoponosejudolisomisi.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/4f34e414-05c2-4fb3-a3a3-1846906e7148/hugo_weaving_height_weight.pdfIn PDF document text
    • http://rukojipunuwupur.epizy.com/assessment_strategies_that_can_increase_motivation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7da523ed-4e4a-4507-8f37-5d70f6355214/html_style_table_row_height.pdfIn PDF document text
    • http://gefetela.epizy.com/46763957516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9b6e7c-8cc5-4edd-9774-bdec590509df/62381403087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a016a6-2ca1-4991-a290-92ebeb463626/how_to_install_graco_4ever_extend2fit_forward_facing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9423a8-9761-4e69-8620-b046ceb0dda3/54037098068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27a5072-0378-45c8-9d4b-ec03a9a4d19c/bizudozaviposeb.pdfIn PDF document text
    • http://jujimewukekupur.epizy.com/34923883306.pdfIn PDF document text
    • http://gevelajuxewud.epizy.com/84482546112.pdfIn PDF document text
    • http://wibadimitizivi.rf.gd/9899001240.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_off0000ede9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE9 5556 bytes
SHA-256: aef29f5b7fa804fc950bee0fbb78b7b949112110ee2d8cca5e46879db78392fb
font_01_sfnt_off000100e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 10380 bytes
SHA-256: ad75548deee4665593e0bd9bd47a90ffdce051dd1df045da78144852a01d9005

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