Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7eaa4b1d19f2f6…

MALICIOUS

PDF

43.2 KB Created: 2020-10-15 06:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a5550c44077c6d978e1cfddbea786740 SHA-1: 55dc9f60a126b16fefc64850e154e1d391ad211e SHA-256: eb7eaa4b1d19f2f6a55978545b53740d7dce4988b963e5df70bcbe3f90fa30fc
144 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically aiming to trick users into downloading an APK file. The presence of a malicious redirector link and the callback lure heuristic indicate a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, aligning with techniques used to deliver secondary payloads or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://cctraff.ru/pify?keyword=download+boss+revolution+apk In PDF document text
    • https://site-1042020.mozfiles.com/files/1042020/35965162827.pdfIn PDF document text
    • https://site-1041212.mozfiles.com/files/1041212/27559374532.pdfIn PDF document text
    • https://site-1042776.mozfiles.com/files/1042776/dogatewox.pdfIn PDF document text
    • https://site-1036781.mozfiles.com/files/1036781/67897902308.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/9b4d907faf5.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/96a6179e0.pdfIn PDF document text
    • https://vadutivolojogo.weebly.com/uploads/1/3/0/8/130813650/00c4cc104857.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f870ec6788b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f875a06d6571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f875a4a185f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f8741679d531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f8729b2e0097.pdfIn PDF document text
    • https://site-1040242.mozfiles.com/files/1040242/2778495101.pdfIn PDF document text
    • https://site-1045368.mozfiles.com/files/1045368/37158279682.pdfIn PDF document text
    • https://site-1039209.mozfiles.com/files/1039209/ponotepawazariz.pdfIn PDF document text
    • https://site-1036744.mozfiles.com/files/1036744/zuraxotuboduru.pdfIn PDF document text
    • https://site-1039785.mozfiles.com/files/1039785/59943454502.pdfIn PDF document text
    • https://site-1041851.mozfiles.com/files/1041851/liwokevarat.pdfIn PDF document text
    • https://site-1039324.mozfiles.com/files/1039324/youtube_video_download_free_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9358/1212/files/home_depot_newark_ohio_careers.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_off00005e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9F 5308 bytes
SHA-256: daf2c5f9a1914d72013f5d929abd119779ffc086ce39c8d47f63332252a0389d
font_01_sfnt_off000070d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D0 14320 bytes
SHA-256: 5b339c2190e771eefa353c39a65da10c585a3678a3f6be8e0ebc750d7d198452