Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a7f9a7d2ff36d9…

MALICIOUS

PDF

79.3 KB Created: 2021-03-17 04:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7302faeb0f21f1b88706a3cc9454fa4d SHA-1: 2139722cfd9a084c0c453a023f616fcf3b7c6a3a SHA-256: d1a7f9a7d2ff36d9413c90e065f8c1a845afc3b1386cd14f80f480310ca55939
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or SEO spam campaign. It contains a large number of external links, many hosted on disposable domains like 'weebly.com' and 'sqhk.co', designed to redirect users to other sites. The document body, though heavily obfuscated, appears to be a lure related to flower meanings, likely to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://fokemale.ru/strik?utm_term=meaning+of+flower+colours+roses PDF link annotation
    • https://rifewageza.weebly.com/uploads/1/3/5/3/135349229/5082673.pdfIn PDF document text
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/tolir.pdfIn PDF document text
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/2617886.pdfIn PDF document text
    • https://cdn.sqhk.co/tezikegoj/diimQrD/rikosigateneza.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/Ehdja3C/lepibatopavuf.pdfIn PDF document text
    • https://durirumis.weebly.com/uploads/1/3/3/9/133999752/dozejiruzaxanulasaga.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/ehbgfR1/2015_dodge_dart_rallye_specs.pdfIn PDF document text
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/nedovanesizexo.pdfIn PDF document text
    • https://ruvedusipokowu.weebly.com/uploads/1/3/0/8/130813644/geparemaru_bezafer.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/8883202.pdfIn PDF document text
    • http://lanutovuvilug.iblogger.org/anticoagulant_download.pdfIn PDF document text
    • https://masezinonorokun.weebly.com/uploads/1/3/4/6/134685416/besomemivufaze-juvilelafado.pdfIn PDF document text
    • https://xuwowazasoko.weebly.com/uploads/1/3/4/0/134041707/bawerubu-sikugozubefa.pdfIn PDF document text
    • https://zonulufeviwupaz.weebly.com/uploads/1/3/2/8/132814448/lopewikoduja_xuselapatave.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/5657782.pdfIn PDF document text
    • http://jupizuginilumop.22web.org/website_design_templates_html.pdfIn PDF document text
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/491ffe4db.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/d57f99b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95a83a18-022f-4aa5-9dc2-588eac4c5c4a.filesusr.com/ugd/ccb6ab_03adbd492d794dae9005abbfec5d3e6d.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_3f3bdaef574f407293dcd0e49ed2c77f.pdf?index=trueIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_25b5d33bde18476494ecd3d6720e8f36.pdf?index=trueIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_7939972d3cea43c59072add1fbe19477.pdf?index=trueIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_655c56c64c234027ba88709c5cf6167f.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_off0000f747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF747 5148 bytes
SHA-256: b443556c237be797d76166798b50b06b5db849e83e091d2fdc87493d77fc2ef1
font_01_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 11092 bytes
SHA-256: 68e7609cb9e0c114ab6dab02cd6b5cbfa93f500966bcf2097724f11942fac913