Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d8b5c20b896d61…

MALICIOUS

PDF

81.8 KB Created: 2021-03-16 14:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a500ef95d2c70a1c0b5905133ffbd266 SHA-1: c522b930801e9c392f2746dc9b03342099680d1c SHA-256: 69d8b5c20b896d615a52b2f1a27f13155698643d87060fa9c25e26fb29af32a8
124 Risk Score

Malware Insights

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

The PDF file contains embedded links and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing lure disguised as a tutorial download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8929

Heuristics 4

  • 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
  • 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://lozipotod.ru/award?keyword=java+tutorial+in+tamil+pdf+download PDF link annotation
    • https://cdn.sqhk.co/ruwibinewife/ggDgfid/gavajekagiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403537/normal_5ff8bb7ccf358.pdfIn PDF document text
    • https://cdn.sqhk.co/komifugu/idijFPr/besovulesavujokiremen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417129/normal_5fc914e990852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415544/normal_5fd7a19307991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501029/normal_5fc8af3a5a36c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418993/normal_5ffcd3c43a866.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/character_design_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ec17ef-610d-4268-aacc-7ccce9c9f48c/is_the_green_mile_loosely_based_on_a_true_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de86317d-eac8-4dc7-adb0-ff4f437291e8/samsung_galaxy_a20_6.4_hd_tracfone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c858af06-9107-4472-b947-546a38d13010/sijozuv.pdfIn PDF document text
    • http://felawikemuda.epizy.com/96644805006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dab5557d-cb2d-45f8-b586-7061397a078d/will_acupuncture_help_fibromyalgia.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/airdroid_premium_terbaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01569ed0-9419-4cb0-8a92-6c3af3fc797d/what_should_babies_be_doing_at_24_months.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfae4946-b948-4e4f-a743-decaa1e8fc80/57198889054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad4cbe5-8803-4387-9b73-1c2e0b81dc9c/dogopigatutepekesakigeg.pdfIn PDF document text
    • http://metepukiwameme.epizy.com/gmat_official_guide_verbal_review_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d363d0-5820-43d2-a518-7037424ec32c/what_does_ankle_bracelets_represent.pdfIn PDF document text
    • http://kabexumowexugu.epizy.com/evaluating_factorials_worksheet_answers.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001082a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1082A 13848 bytes
SHA-256: f757a7b6bfee34afb23cdfd4b2c9e23f8b44735d30868e0f3c1466e44c11cb09
font_00_sfnt_off0000f6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 5148 bytes
SHA-256: c40313a537174ef76214b6555b478d9a79d4bdac45834ded46f51ac35b14034b