Malicious PDF — malware analysis report

Static analysis result for SHA-256 52282fa3724059be…

MALICIOUS

PDF

73.4 KB Created: 2021-03-20 03:28:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fdfe49e960b863951dd0751a56398b13 SHA-1: 95f8aa727c3e3f5f9959e0d69743b516dda2e553 SHA-256: 52282fa3724059befbaf3338c084d233db41490de2bd16fe7b30c0ed70f8f051
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 0.9998

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://gimoguvi.ru/123?utm_term=aditya+kannada+movie+songs+free++320kbps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375515/normal_60552ffce8ba8.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/noughts_and_crosses_script.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/hPjfgej/74013603566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5fd991e9eb0d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_6010253b1ed13.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/nigebozajuje.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/cvsNQnu/lebara_top_up_number_dk.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/82711712218.pdfIn PDF document text
    • https://cdn.sqhk.co/busekonel/dqjfgdR/10083852964.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/jchcwhf/90715113287.pdfIn PDF document text
    • http://f1l3download.site/55169385913a8jma.pdfIn PDF document text
    • http://bupetud.xyz/fubisevozawvjxis.pdfIn PDF document text
    • http://rogevunesopu.medianewsonline.com/bissell_crosswave_pet_pro_cordless_vs_corded.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/laptop_hp_probook_6540b_specs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_2eb93c4a440c4e7692e6a916afcda9bd.pdf?index=trueIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_2082a3b2817d45d89f1e722c7d530f78.pdf?index=trueIn PDF document text
    • http://lopakesuzuw.atwebpages.com/calculus_textbook_larson.pdfIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_eeb39fbee8e44d4eb85ee765aebf2ca8.pdf?index=trueIn 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_off0000dc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 6120 bytes
SHA-256: aad78c5a8fc1f3d0ef4d13cd17e8bcc248b9df7b24147dae0db51af3ade009c8
font_01_sfnt_off0000f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 10884 bytes
SHA-256: 04513ae193558d986b8c7bb67eb5ca33819ace700bf615d8d79cdfd98cc345c4

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