Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c66310519a201f…

MALICIOUS

PDF

71.4 KB Created: 2021-01-13 10:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f4856f2eb315be9710e10ceb3fcd4662 SHA-1: db3a7709450716fcb67021e4596ed61da41b79f4 SHA-256: f9c66310519a201f52674250994b5c4581b7646ac0f56d7bff62f97253f5d39c
184 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to 'Alagaesia map minecraft', suggesting a lure to attract users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=alagaesia+map+minecraft In PDF document text
    • https://site-1176040.mozfiles.com/files/1176040/cardboard_recycling_center.pdfIn PDF document text
    • https://site-1168045.mozfiles.com/files/1168045/51090500111.pdfIn PDF document text
    • https://rakonudiboxenej.weebly.com/uploads/1/3/4/8/134874851/90b1506.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/2c2d92f836a73.pdfIn PDF document text
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/c0128852c.pdfIn PDF document text
    • https://zegimobigew.weebly.com/uploads/1/3/4/3/134313375/2897488.pdfIn PDF document text
    • https://site-1228379.mozfiles.com/files/1228379/75492629358.pdfIn PDF document text
    • https://site-1183516.mozfiles.com/files/1183516/guide_foil_turning_3d.pdfIn PDF document text
    • https://lupexepiw.weebly.com/uploads/1/3/4/3/134318885/wukujinameruwoxajes.pdfIn PDF document text
    • https://site-1168513.mozfiles.com/files/1168513/zepixuz.pdfIn PDF document text
    • https://site-1167972.mozfiles.com/files/1167972/23773305206.pdfIn PDF document text
    • https://wopirizebopate.weebly.com/uploads/1/3/1/4/131452778/1b7035390cd427.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/goviwigax/midiposo.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/autocad_editor_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE03 5004 bytes
SHA-256: 9a044f6524ab17f80cc05df28950983110524e43d93033d54f687cb7e6f9b6ce
font_01_sfnt_off0000dee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 10660 bytes
SHA-256: 2c66e0de337c33da0ec55c2c2d01d99fcc1d82a4a42a9aa3caf8efc33ef431d5
font_02_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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