Malicious PDF — malware analysis report

Static analysis result for SHA-256 287daf328d5b494a…

MALICIOUS

PDF

74.9 KB Created: 2021-03-08 12:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1db0a778bf77d7ce5a2acd05c835e3cf SHA-1: bac9c38d02542012b165d3cfe34bde07553df997 SHA-256: 287daf328d5b494a25fd8d885eecab689fd883548f4013d2b759589428da069c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common technique for SEO spam or phishing campaigns. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, and ClamAV detected it as Pdf.Phishing.Trojan. The embedded URLs suggest an attempt to redirect users to malicious or spam content, likely related to the document's title about job management.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://xajibur.ru/wb?keyword=what%20to%20do%20in%20the%20first%2090%20days%20of%20a%20new%20job%20as%20a%20manager PDF link annotation
    • http://ooovseanalizi.ru/free_monthly_expense_sheet_excel_templaten0cuu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5fc9aa12bf291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_6044e7d83d607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374968/normal_6036e3084b731.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5ff514e10e711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373768/normal_5fcc10422a0d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fc60e993da78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_603c08f838c30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477863/normal_6018e484107f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_60400b17c1c41.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/xepuxijeuae3.pdfIn PDF document text
    • http://meetsalle.xyz/23472102750n6c6k.pdfIn PDF document text
    • http://zdorovienashevse.xyz/true_metrix_meter_e-3xmdzs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387581/normal_5feeb5d718428.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_652602f268eb47b7a0665d7538e45a92.pdf?index=trueIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_3b77f3b4e5fc424a99b01c76f057753d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/larks_head_knot_for_jib_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/costing_and_quantitative_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/41342812833.pdfIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_fd4b433a166b4b779ae0cae315479673.pdf?index=trueIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_b70edf9fc2ce4389a59a85d37719a16b.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_off0000e4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F2 6012 bytes
SHA-256: 48d36f1d48ee8e96f7b12e591df6b665acea9930678a638c37b2f76966b06041
font_01_sfnt_off0000f958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF958 10784 bytes
SHA-256: 912f0961ac9f75739305f35aa48e10ce0830f47be6a036473ae97462cff1db90

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