Malicious PDF — malware analysis report

Static analysis result for SHA-256 f118679b3698a92b…

MALICIOUS

PDF

67.9 KB Created: 2020-11-18 04:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 52fe03f166ecd4b761a4814bd8223842 SHA-1: 0d04f7ade1e3c09e18fa5941b9c8e5156aecff00 SHA-256: f118679b3698a92b478869284e656aa135d169b967c49656bb1c5fa53740f057
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 point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?utm_term=vocabulary+workshop+level+f+unit+13-15+review+answers PDF link annotation
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/fojemapisemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5fa76143d68dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_5fa5d174412b8.pdfIn PDF document text
    • https://letalisukom.weebly.com/uploads/1/3/4/3/134316231/texivogad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f8dd043008b0.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/6287090.pdfIn PDF document text
    • https://baxolelal.weebly.com/uploads/1/3/4/6/134625426/kidalo.pdfIn PDF document text
    • https://subonotewus.weebly.com/uploads/1/3/4/3/134347286/7ad7e7d9f0aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/gods_creative_power_by_charles_capps.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/arduino_matrice_led_8x8_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/79725994153.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/29729618701.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01A 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000ba5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5C 5896 bytes
SHA-256: 6dd632154bb9566e00fd846c2d7ed0c4796c591ffd4d101770a7bf1f135c5da5
font_02_sfnt_off0000ce99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE99 10552 bytes
SHA-256: 5e4aa2d1247ce24d9a15709137d8bd7a497e603efdd2e2ddaf8f4adaf01ecb36
font_03_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 6152 bytes
SHA-256: e4b8c44b8d628d2cf27c962540c34ea3f872d2831e504c749093db44ca1b11cd

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