Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5f3078092332be…

MALICIOUS

PDF

74.3 KB Created: 2021-04-05 11:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d95bebb1e04fd20a195e6c7af20ba510 SHA-1: 01e8a6917e011ce9ed8d69079b35a29ecbf61f13 SHA-256: ad5f3078092332be2ac29201636f99b344919afc2c7fe062c248869620580040
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/123?utm_term=michigan+warranty+deed+forms+free PDF link annotation
    • http://wogizejelalod.iblogger.org/81699871384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426679/normal_60430c9bb8107.pdfIn PDF document text
    • http://lapegokexixij.medianewsonline.com/in_cab_air_brake_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454299/normal_6022d1134f786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_603659635ffbc.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/95843336373.pdfIn PDF document text
    • http://blancop.xyz/kozutixawuwogrgaz5.pdfIn PDF document text
    • http://azorocheat6.xyz/what_is_meant_by_sociological_imagination_meaningo6ypd.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/about_time_book_richard_curtis.pdfIn PDF document text
    • http://italywow.pro/swagger_ui_button4ieoq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baxujaxifibew.rf.gd/gunizubofupupulizugukox.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_fe0717a151aa44749bd9e871f9d1ee05.pdf?index=trueIn PDF document text
    • http://jufosuliz.epizy.com/cleanline_surf_report.pdfIn PDF document text
    • http://ferugasa.epizy.com/56308174566.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_75130a38c2bf42aea548359a84bb5e9f.pdf?index=trueIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_6402ea49ecc742cc81802cddd738eb63.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_51bdfa83b75e4ca6813353f38e0ef264.pdf?index=trueIn PDF document text
    • http://zelojagedalelo.epizy.com/60719023756.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/spelling_words_for_grade_3.pdfIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_01a19e182ae7420b98dcdad803b3c1fe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 5600 bytes
SHA-256: 07cf27a35ee95a9600d2c9a2d9be14395a68a566ef93f46d0962458c542d4466
font_01_sfnt_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 11300 bytes
SHA-256: 266ad09757cd7cce3d68bfb44b79f24c433c09dd0759184277e4c629f542c66c

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