Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba50809fdac925b0…

MALICIOUS

PDF

81.2 KB Created: 2021-04-02 20:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c7d30bdc16f433b7cb059123e5e56a3a SHA-1: b0511e3ed369c6b548604ec4950331109d23323a SHA-256: ba50809fdac925b02b3da84dbf129d10e7b5778749fccedfb2087bc9a3490a59
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 0.9996

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/wix?keyword=advanced+accounting+13th+edition+solutions+manual+free PDF link annotation
    • http://gisoboxizaza.mygamesonline.org/30109528247.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/fhhgfie/environmental_scientist_jobs_near_me.pdfIn PDF document text
    • http://vivebax.iblogger.org/71576350236.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/can_i_make_my_tv_remote_control_my_soundbar.pdfIn PDF document text
    • http://rezumitisud.mygamesonline.org/76669743304.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/37858230401.pdfIn PDF document text
    • https://cdn.sqhk.co/fidumugovoz/dgjbslS/585925381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_601e2bda2d9cd.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/3RAhf8z/86796654705.pdfIn PDF document text
    • http://cabinetshub.xyz/lego_harry_potter_1-4_hogwarts_castle_gold_bricksh2way.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/eighfhc/12523142505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481673/normal_5ffc4eda61fb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393041/normal_5fce8f2012395.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/78835757018.pdfIn PDF document text
    • http://allostar.buzz/resumen_del_libro_11_minutos_paulo_coelhoatpmv.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/598b2bb5-dccc-4945-aefd-994020712854/58201754526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc5d2ae-4339-4ebd-ad57-b7a4f7c381bd/art_drawing_ideas_for_beginners_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cef8596-3020-4bbe-9eab-e87f6e58ee0a/is_little_red_riding_hood_a_fairy_tale.pdfIn PDF document text
    • http://mapupove.rf.gd/bombay_stock_exchange_information_in_marathi.pdfIn PDF document text
    • http://fevelejuji.epizy.com/california_critical_thinking_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae832e2-fc98-469f-8516-57cad861ce2c/forrest_fenn_house_location.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_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 5700 bytes
SHA-256: b995610ae61b61a059923dbeed4f58ee005a9d075f0cfa96c93e8a4304678aa2
font_01_sfnt_off00010f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F88 11476 bytes
SHA-256: d0a9c6acca4725e1531fc6becb1a14e735ab2916de0957811ce9e8b22a38462e

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