Malicious PDF — malware analysis report

Static analysis result for SHA-256 687d48452978b721…

MALICIOUS

PDF

76.6 KB Created: 2021-03-11 18:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 333779746bc826ca44ce2faeb963af60 SHA-1: 3712bf4d4b37b67d2a47c333d38b892e0716bace SHA-256: 687d48452978b7216dbdd99ed8199844f72a21e8f5e191f5b9d1f2c280d68c89
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, masquerading as a search result. This suggests a phishing or redirection attempt to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://xezojetit.ru/wb?keyword=what%20are%20examples%20of%20thermal%20expansion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416921/normal_60318038db872.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/yigIxhb/zeteviwenivumopese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407747/normal_601ff20e8314d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_6001803058695.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/hc2NjaB/epic_race_3d_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_603e88f2bd6f2.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://uploads.strikinglycdn.com/files/a37f854c-9542-46f6-b7f9-a764426fbd6d/is_evenflo_car_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1156af-f3de-444b-9e15-b62ea59c9942/37699980615.pdfIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_38537382fd2f4a1c9fe251f36b9a6e77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c21d1ad-a7cc-4d6c-b6ea-2a499eb70f94/learn_visual_basic_2019_edition_a_step-by-step_programming_tutorial.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_0e4c2d42aa0b4ec29974adf13b699df8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/fasoviwezizafid.pdfIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_cc1b0db818194513a914e6294bf4601f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutisigila/71535246945.pdfIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_a878f491ad3a4d1d92909402e4bb5e64.pdf?index=trueIn PDF document text
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_0982e9cbd6154164919ebe8b03efb360.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_2cc5ec7956e94c519bc5f7ec07d4182c.pdf?index=trueIn 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_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 5008 bytes
SHA-256: ab7d4d552a8daa77c0eea63598a7da5a7c87d986d21d73dd4e2d5151ba6366fc
font_01_sfnt_off0000f090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF090 10812 bytes
SHA-256: 61990382fbac0c84d70003eaf3b96ced48e28bbe1f774d56f4ee339ae62aad66
font_02_sfnt_off0001157f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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