Malicious PDF — malware analysis report

Static analysis result for SHA-256 44114add19d84891…

MALICIOUS

PDF

85.6 KB Created: 2021-03-19 14:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e7c7f5a3f43557bfc15e3e19aa5dce27 SHA-1: 21d3c6e6b564c4cf6b1c5be7566b9b59505a8ba8 SHA-256: 44114add19d84891abe12bd28172b23c3509aea878537b9159d18fce9d1849f3
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://midufefew.ru/strik?utm_term=the+far+side+complete+collection+pdf PDF link annotation
    • https://cdn.sqhk.co/notizejamebo/I0BChaq/android_phone_hotstar_app.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/kadapejofak.pdfIn PDF document text
    • https://bitoranajezope.weebly.com/uploads/1/3/1/4/131453137/legaxedegere-lesilita.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/ig6geji/76595035816.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/hjghdge/84025163770.pdfIn PDF document text
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/zakifatugewo-xexugupinajim.pdfIn PDF document text
    • https://wariraxaluxar.weebly.com/uploads/1/3/3/9/133986847/9685919.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/ambassade_du_canada_au_cameroun.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/c5a2a4f6-cde3-4892-8f79-63dd81270271/1245399252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa253e08-f727-49db-8b41-604a2eb3d137/bodaliwirelowinavi.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/65540258782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcccb9df-64dd-44cd-9413-033ba0c4fe01/makopokaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f2c220-7f0e-4328-ab34-3cfbededddbf/how_to_find_linear_speed_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277fa4a3-6113-43de-9455-2cf2ceac0f7f/como_rezar_en_familia_la_corona_de_adviento.pdfIn PDF document text
    • http://fukorow.epizy.com/castle_clash_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7299bcc3-f1ad-4d48-9014-5595b0e3ad81/38087724490.pdfIn PDF document text
    • http://ligizasin.rf.gd/workkeys_test_scores_bronze.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_off00011125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11125 5344 bytes
SHA-256: dcb4bf619ae7b14234c548d6a184b3507bcc182aa188418bbad093e1150cef5a
font_01_sfnt_off00012329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12329 11228 bytes
SHA-256: 0e270aeb9a092d6bf76142f1f53bc1fd0d033ad1a10b1a4ce4d0f56dea3d15e1

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