Malicious PDF — malware analysis report

Static analysis result for SHA-256 52cd518077774d08…

MALICIOUS

PDF

78.8 KB Created: 2021-03-28 11:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e53ae1efc8230e75a978383f79eba9c SHA-1: d2a750e60c84ec1d437d5476ded6d049c2a74061 SHA-256: 52cd518077774d085da9c13aeecfbad363ada5589c1784e0fcad7c1642dec35d
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the embedded links points towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=car+swamp+cooler+parts
    • http://nowanedilado.22web.org/tri_wall_cardboard_sheets_uk.pdf
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/vifotedaneporo.pdf
    • https://cdn.sqhk.co/tutabudoxuwa/fggh5rs/31862938051.pdf
    • https://static.s123-cdn-static.com/uploads/4376870/normal_5fe437b507432.pdf
    • https://cdn.sqhk.co/terexugureto/eE0lidP/baldur_s_gate_apkpure.pdf
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/lovikafixeleledu.pdf
    • https://funexoxep.weebly.com/uploads/1/3/2/3/132303151/dafupu_vuzirezarewive.pdf
    • https://cdn.sqhk.co/nozedimasav/ghjgehf/phoenix_arizona_time_zone_daylight_savings.pdf
    • https://cdn.sqhk.co/xegunorasu/hpjbrlB/86316378127.pdf
    • https://cdn-cms.f-static.net/uploads/4426080/normal_605f49b71de2e.pdf
    • https://cdn.sqhk.co/fubafonu/RigLD2y/59245719312.pdf
    • https://cdn.sqhk.co/sejejajoxej/ghgojiR/vibof.pdf
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/b14d9.pdf
    • https://cdn-cms.f-static.net/uploads/4414515/normal_604f8a9fbb882.pdf
    • http://jodopafipunew.22web.org/ielts_general_reading_mock_test.pdf
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5fd1803e945fa.pdf
    • https://cdn.sqhk.co/tejosepu/hbWLLDo/top_jockeys_in_horse_racing.pdf
    • https://cdn.sqhk.co/raserijene/dohajdE/21265333615.pdf
    • https://cdn.sqhk.co/sajatanugeg/H1noZhj/fovadebebanujeze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_b520d6ee8d964bbc8b5d845a491e7a27.pdf?index=true
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_a9a12c4571624ddfb5230ac9619652ef.pdf?index=true
    • https://ad177677-9664-42cd-9bf2-17a10eef6e1d.filesusr.com/ugd/f8915e_94d74aeed00b458ca6b0ccc110b586c7.pdf?index=true
    • 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_off0000f761.bin
50b32329ab86cdb3d6c91aa4424da5131047c5d7ba9175e99a8927465b401809		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF761 5076 bytes
font_01_sfnt_off0001089a.bin
7a8adc1efaa49ae995c235320f317267c3acb1d4ac7f0c39a7dce3bcb36bcde8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089A 11008 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.