Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f45ccac728eaf7…

MALICIOUS

PDF

76.4 KB Created: 2021-02-25 06:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 70ae352f59b9a0a3ad02e698fe7fa22e SHA-1: 5150d96245357abe941f6dd106ce13a6fe7d53e7 SHA-256: d2f45ccac728eaf71a3ee23bb26b21656a738b87aada99e42849aef2dafe1914
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm. This is supported by heuristics identifying it as a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' suggest malicious intent, likely to redirect users to phishing sites or potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=biology+essay+questions+and+answers+form+4+pdf PDF link annotation
    • https://buginibonimej.weebly.com/uploads/1/3/2/7/132711973/kukilifezix-jumirud.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/ihZfPIG/eric_church_songs_2019_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/01jfsBK/pulonegotogumoxefigakazig.pdfIn PDF document text
    • https://cdn.sqhk.co/nudogada/a6jiSU1/nirolorinotetebuvove.pdfIn PDF document text
    • https://favonewe.weebly.com/uploads/1/3/2/6/132695639/5058219.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/a82f2711.pdfIn PDF document text
    • https://seritixatot.weebly.com/uploads/1/3/1/0/131070849/64ba56281.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/hcifdPb/oneplus_launcher_apk_for_any_android_xda.pdfIn PDF document text
    • https://vojitimene.weebly.com/uploads/1/3/4/5/134596684/devukiwuwiziv.pdfIn PDF document text
    • https://cdn.sqhk.co/xugumewaz/Gijjgj0/12862259740.pdfIn PDF document text
    • https://zizovotitimojuv.weebly.com/uploads/1/3/2/7/132712514/kebimaruvi.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/5a635.pdfIn PDF document text
    • https://bifukedupojuxi.weebly.com/uploads/1/3/4/4/134498794/9b70edaeb4164.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/8702465.pdfIn PDF document text
    • https://zeduxuvanoripi.weebly.com/uploads/1/3/0/7/130775880/2126864.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/1771084.pdfIn PDF document text
    • https://vepiniripalur.weebly.com/uploads/1/3/4/2/134235349/vifibu-tekofusedavago-fisorajagiwoto-kopanotivaposaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_601125f89e396.pdfIn PDF document text
    • https://napokepuwaju.weebly.com/uploads/1/3/1/1/131164128/lemalixalusef.pdfIn PDF document text
    • https://wipowolulufobud.weebly.com/uploads/1/3/1/4/131437369/resef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 5816 bytes
SHA-256: adc79dfdb823dd7c74f830d1913e5a71a7cbb57420199b6aba81f407f6f32526
font_01_sfnt_off0000ff3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3D 10812 bytes
SHA-256: 00806d7cd940068524d9754dffea846724fdae5dfcd26b7ff5e607800c918dc5

Open this report in the interactive analyzer, or submit your own file for analysis.