Malicious PDF — malware analysis report

Static analysis result for SHA-256 312bcf047e82e5d0…

MALICIOUS

PDF

75.6 KB Created: 2021-03-18 02:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 34c2ff06bba034dcf0cb9cdefa134e26 SHA-1: e6437c1e1cc8c374387a80e81083b26f6a8454b3 SHA-256: 312bcf047e82e5d080f049d10dd9629b33db0f92a2724e83f90a43a114c7d1a5
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malicious link farm, as indicated by numerous external links and a critical heuristic firing for PDF SEO link farming. The presence of a download button lure further supports the malicious intent. The primary malicious URL identified is dugedepap.ru, which is likely used to redirect users to further malicious content or download payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/123?utm_term=rupinder+gandhi+full+movie++hd+okpunjab PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467581/normal_5ffcaa5785c44.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/dalanuzesogogo-tivuzude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495037/normal_60395e47bbc7c.pdfIn PDF document text
    • https://josojizaxa.weebly.com/uploads/1/3/5/9/135966587/2562015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_603f8dad36b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_6038e4282b1a9.pdfIn PDF document text
    • https://semuvobe.weebly.com/uploads/1/3/0/9/130969465/8360dde8951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381529/normal_6003a434961a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_315ac01bf71d4562bef92e3070b663b5.pdf?index=trueIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_ddec4e05fbc64643b22867cec32f6f75.pdf?index=trueIn PDF document text
    • http://vuduluxepo.epizy.com/c_compiler_for_mac.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_810c160874004ef0b79fbc1c7df5057b.pdf?index=trueIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_8cb2f252be0e4c5cb937403aafd518f2.pdf?index=trueIn PDF document text
    • http://lenepozomewu.epizy.com/nicotine_replacement_therapy_nhs_guidelines.pdfIn PDF document text
    • http://sobogasitizi.epizy.com/68758480117.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_0e43b2bf859c41c3bf2b42570382bf6d.pdf?index=trueIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_770115c5cf71471b8aaa521f4f98093d.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_b719ac73806b43fe9d6087b172ef91ab.pdf?index=trueIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_2a7b09ccfebe467faed061619534b17c.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_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 5624 bytes
SHA-256: a83be46bf380c2a0262204978af7cbadc4b4f39185ac396c033522caf54a9a5c
font_01_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 11288 bytes
SHA-256: 0fd0b1868d6e9d57b32845e5f484cd6c71feda9583ef24cca7aa98a39c292804