Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ad501dd547c38d…

MALICIOUS

PDF

59.9 KB Created: 2020-12-15 11:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 114d2402c0f41a3bdac41b855d9489fe SHA-1: ea780cdb8aa491582cbc64ebb8071159de9860b5 SHA-256: 46ad501dd547c38dbc28b5d56dd2c671f922cd2d0b410c147c1a4e5cc5356ab2
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one pointing to a suspicious URL that appears to be part of a link farm designed to drive traffic. The document body, though heavily obfuscated, contains text fragments suggesting it's a lure for 'investigation answers' or a 'school calendar'. No scripts were extracted, but the presence of multiple external links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/123?utm_term=moving+straight+ahead+investigation+1.3+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482228/normal_5fb59f35e3063.pdfIn PDF document text
    • https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/gutulo.pdfIn PDF document text
    • https://jufopikigon.weebly.com/uploads/1/3/4/3/134309667/fejesewumupuzen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5fc9fa699813d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d39a68-76c4-4a61-9f14-3f813b871d73/district_116_school_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b66569d-9694-447a-abe5-970fc7a70b5c/74303088258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f089c8d7-021b-412c-bdee-a4f572edfb6a/gujowogubamutoteboxejif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e643d593-6c82-458d-96ff-95970558c240/cover_letter_examples_margins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa13bb4d-2a4d-4904-990e-f67ae4ce39f8/36039025618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232bb2f7-8741-4794-98b8-ccf0ee3bdb8d/22290303536.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78ba439503a47f6fe0002/t/5fccf9f1eb18547f4b86be3d/1607268849861/lukamigijofubafirabis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/648db892-a7f0-492c-b866-5cda6b81a38a/nogugujuwemok.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc568bbd49dd12447528097/t/5fd6a180102ca46975ed4692/1607901568516/xedibixigapopilejuzef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924ee87b-7e23-4095-b7af-3bc738b82c56/5480646536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5408e9e8-34dc-490d-83c2-74f7e2977d03/zatarains_blackened_chicken_alfredo_frozen_entree_cooking_instructions_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2260cba8-83e9-4aa8-a6a0-7e6039b11723/gapijotifose.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_off0000b044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB044 5460 bytes
SHA-256: 0660b6d9f8d5a46bc5adb7388bb0a685f91214034bdc6f20ce8c70353ca73d4b
font_01_sfnt_off0000c300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC300 9216 bytes
SHA-256: 9bf6a855fb58660404ec69a1cd62b056572443d3961d36b9077617924da18ede

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