Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd76930617286abd…

MALICIOUS

PDF

71.4 KB Created: 2021-03-12 03:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4ee378b2e5c67d4e85b1a3114407cb72 SHA-1: de97620fe1d9c897285626962e6f545f12de4c5f SHA-256: fd76930617286abd7433bdfb545eadeb3c1a6a03dd488ce79b58472532edbf85
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URL 'https://resalured.ru/award?keyword=spoken+english+pdf+download' further supports the lure of downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/award?keyword=spoken+english+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472200/normal_60434f5c33d9f.pdfIn PDF document text
    • https://kuserivexujeza.weebly.com/uploads/1/3/4/3/134331384/vovugatimevebo.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/fji2rja/77262656008.pdfIn PDF document text
    • https://cdn.sqhk.co/loxakejela/eaijhj8/95754154243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_6042f72d2f718.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415964/normal_5ff2d92a6704d.pdfIn PDF document text
    • https://penonogam.weebly.com/uploads/1/3/4/0/134012545/zawalikulowazola.pdfIn PDF document text
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/aa135eccc.pdfIn PDF document text
    • http://towufugejudet.iblogger.org/99618461606.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/iekWggy/95060565607.pdfIn PDF document text
    • http://zikifogomi.22web.org/53076166055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475209/normal_5fd779819d57e.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/8c437.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/b1a1a6ba-e041-4ae3-a2d3-d7d66fbb86e1/vitexejojajekesovuzerorej.pdfIn PDF document text
    • http://nusonakogip.epizy.com/80834308119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089ab73e-fc9a-424b-9dc6-98bbe5552351/mupijaguxexasaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6967a440-37a6-4826-aacd-30443ec0ad4e/sibar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615831de-3c3b-4532-9f43-753c0fde224f/25082480667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d2ed4b-828b-44c6-b4c5-41c179bab5f7/54304980356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c90f08-19e2-4816-8086-409ca99a54fa/29164476164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c9a2cb-ef3d-4bba-be6b-3fb61fe98d03/black_boy_ch_11_summary.pdfIn PDF document text
    • http://xepepofebaxuvib.epizy.com/lazumarijitav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6fa069c-9c4a-45d4-8aa6-52315155531c/79807416087.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_off0000db86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 5468 bytes
SHA-256: 41c47dca3bd78d683ff5fcb38a72fcc0a707175b568dd6d97aa8e52220ed78f1
font_01_sfnt_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 9984 bytes
SHA-256: 7301f1cb16c50f61959dc0243b291a56886cf9a4c2d76c69abe7dad0089ba8ae