Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcaa2569a5966df2…

MALICIOUS

PDF

89.8 KB Created: 2021-05-08 07:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0200f55034080a503759a21061530808 SHA-1: 93442daf9f958d97831a28e5aaca0c65ee4c4416 SHA-256: dcaa2569a5966df2b07cb9b58a6193131b4b19c465b4399ae7597f3141aeb107
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or a method to obscure malicious destinations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/strik?utm_term=neewer+photo+studio+photography+lighting+kit PDF link annotation
    • http://clientesdkb.com/jiwuremej1o2ot.pdfIn PDF document text
    • http://totalcreditcheck.info/800498851446bpmy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_606419d71839b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_60126a3296987.pdfIn PDF document text
    • https://batusuxejodasav.weebly.com/uploads/1/3/1/8/131857782/deb56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450139/normal_602ecf95686e8.pdfIn PDF document text
    • https://bazuxenulasiv.weebly.com/uploads/1/3/0/7/130740357/zaromenaki.pdfIn PDF document text
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/d728dab0341c6e9.pdfIn PDF document text
    • https://dizufarul.weebly.com/uploads/1/3/1/3/131379939/saxoxazafexetusaza.pdfIn PDF document text
    • http://giocodigital.space/lekewubekiwaaff18.pdfIn PDF document text
    • http://carishr.com/where_to_donate_business_clothing_near_me78p3i.pdfIn PDF document text
    • http://ledy66.net/rilivonevotatutuwr3xhh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_c56d52721c9d4096bc6b585dce67e95f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kujesulad/54900439488.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/3136238636.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_b59e60fe932142efb7524c5ef592d10e.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_da70a3d2ce8c41f8b8342a037a03280a.pdf?index=trueIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_b3d1119ceb67449aa395ad7e2dc89b4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/oracle_database_12c_release_2_12.2_installation_on_oracle_linux_8.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/jonokesijiburowaniru.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/jorobupili.pdfIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_6e2da6f8d31b4095b085a4f2f1db4266.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/jotaronopuxivitidamabin.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_off00011bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF6 5448 bytes
SHA-256: e96c1b5046d70d4a7d9f59ae4d2b1d741e6aad82b73bada3258973745f59d18a
font_01_sfnt_off00012e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E97 12796 bytes
SHA-256: 090a4deecd40aa68c8c4b0f9a96ad7277476a7839b5c06897ee1ed4c96b7185d

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