Malicious PDF — malware analysis report

Static analysis result for SHA-256 86430d863bb81988…

MALICIOUS

PDF

78.8 KB Created: 2021-03-24 10:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e1a098b84f50741d4c52abac6b8f2723 SHA-1: 12c5acc88dd47635d1e813cca54897227e2efa60 SHA-256: 86430d863bb8198838059dd0f9e7bc21cc5bd593ccf038469776ec64726ea8dc
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded links to known malicious redirectors and disposable hosting sites, indicating a phishing or malware distribution attempt. The heuristic firings, particularly 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'ML_NYX_PDF_MALICIOUS', strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'mock gps location apk', which is likely a lure to entice users to click on the malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=mock+gps+location+apk In PDF document text
    • https://ligizedafovawu.weebly.com/uploads/1/3/2/6/132680967/vogajogefaz.pdfIn PDF document text
    • https://divevuke.weebly.com/uploads/1/3/3/9/133999966/ruzeros.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416665/normal_5fdcf0c50e267.pdfIn PDF document text
    • http://bivitajuteje.mypressonline.com/23380445084.pdfIn PDF document text
    • https://gekojufoj.weebly.com/uploads/1/3/4/4/134438070/60a112a8782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_5fe8ffb5aebc2.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/zavikadavir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wozaxanakix.epizy.com/xigigufudaweruxub.pdfIn PDF document text
    • http://posesesu.epizy.com/how_to_replace_battery_in_american_standard_thermostat.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/41941216126.pdfIn PDF document text
    • http://tosuniwenalob.epizy.com/53777683963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4812d9d4-6474-4df5-a234-009e05157ae2/xakuwo.pdfIn PDF document text
    • http://sukijikulo.epizy.com/mefulev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4bf83c-73de-4e0c-a4e1-2575e398c693/17785974022.pdfIn PDF document text
    • http://levapen.rf.gd/94694088421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d81bde-6643-42a6-9d85-a7c3981ed214/what_does_a_software_developer_do_all_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac995e6-4dc4-4444-bcdc-c3293482e5c8/d-link_dir-825_g1_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e13bf861-fec7-4d58-891d-56f2f9444031/hp_4500_incompatible_cartridge_error.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 5072 bytes
SHA-256: 3525a738855444405e15f270c16a571a402f82837234005d1b4dc318d30057f4
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 19480 bytes
SHA-256: cb0947c61297164b7c34f4f53b9e6a8ab2e4e8c35ad07bb0e292f92b4125dec1

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