Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85d46d12bc07376…

MALICIOUS

PDF

78.2 KB Created: 2021-03-04 23:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e43b29a6d5e14cdf08ecbe9e96d5f1c4 SHA-1: b6e1156c01aba03626b791d998500422c03ffea6 SHA-256: d85d46d12bc07376f6cdfa9dda29e7ac027b76e854cf6f82d40e2658ebf2a1eb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/123?utm_term=shure+pgx4+frequency+chart
    • https://cdn-cms.f-static.net/uploads/4469359/normal_603c1599955c5.pdf
    • https://cdn.sqhk.co/tekemozuj/dXjbgdO/jimu_robot_builderbots_kit_instructions.pdf
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/nuzokemenuju-jovizi.pdf
    • https://cdn.sqhk.co/sofizagumup/FjdgMYQ/dr_gary_chessman_oviedo.pdf
    • https://cdn-cms.f-static.net/uploads/4425768/normal_602f4a246611e.pdf
    • https://cdn.sqhk.co/wimedizi/egjhBjj/teppanyaki_grill_laurel_coupon.pdf
    • http://kenijukawog.22web.org/sql_server_2019_developer_edition.pdf
    • https://cdn.sqhk.co/dubikureta/heKtEhd/coloring_pages_for_animals_in_the_jungle.pdf
    • https://japowubameke.weebly.com/uploads/1/3/1/4/131483598/kiseji.pdf
    • https://zovakobazala.weebly.com/uploads/1/3/1/4/131456363/56bc8d6a87c2.pdf
    • https://static.s123-cdn-static.com/uploads/4498330/normal_5fe42827e2ddc.pdf
    • https://cdn.sqhk.co/tatidukigag/jibXlWD/jotavuziwodeponosudekawiz.pdf
    • http://wuwisometojone.66ghz.com/serifadamivora.pdf
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/nafirulol.pdf
    • https://static.s123-cdn-static.com/uploads/4382627/normal_5fc7965793975.pdf
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/5353724.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_7d897acda444491daa9eb5db5ff87326.pdf?index=true
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_9b5038ecc80d4072b7fa86322513277b.pdf?index=true
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_4a9fbc247cc24338893fde891d7f161c.pdf?index=true
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_789e660a22104a74a7c100784ae68c0a.pdf?index=true
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_4796ddd5146f41e19ca292b1ffb3c241.pdf?index=true
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_5abc6692329743e5ba17d53d11ac5f90.pdf?index=true
    • http://getidevip.epizy.com/football_training_for_5_year_olds_liverpool.pdf
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_d0467c1111024cbda7aaec6b0fbb50da.pdf?index=true
    • http://lafatakijuton.epizy.com/lidubonuruzuwuzesujasa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f26e.bin
aeee3d41d10da00f681c58b40268cfa6913a8c6bc102e5bb4499b281f8d4a7a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26E 5552 bytes
font_01_sfnt_off0001056a.bin
40810e074e40de671f41dbef80da2437b5a14e9122d65db3c0d92beee01ab40b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1056A 10996 bytes

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