Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfa8d5fc8babc06…

MALICIOUS

PDF

90.7 KB Created: 2021-04-06 16:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 491f79d001e1f413dd645900cf927be0 SHA-1: 221f9b41c1dd94d2ae96a6e3021f8104836abe48 SHA-256: 1bfa8d5fc8babc060fa19d04fa03f69612d21ef8b9f4491a2e29f42d10f99709
134 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded links and a deceptive download button, suggesting a phishing or malware distribution attempt. The presence of external URIs and a link farm heuristic further supports the conclusion that this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=the+girl+from+uncle+dvd+box+set PDF link annotation
    • https://cdn.sqhk.co/rekosiseweno/gghbPuM/skipping_rope_training_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/ihVJFgc/53930725941.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/ordinal_numbers_worksheet_for_grade_3.pdfIn PDF document text
    • http://getbuiss.online/culture_shock_esl_worksheetxbje6.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/paxevug.pdfIn PDF document text
    • http://tixshopclub.fun/aditya_369_telugu_movie6rb9r.pdfIn PDF document text
    • http://jigofajun.22web.org/40832941871.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/used_nikon_sb_800_speedlight_flashw5108.pdfIn PDF document text
    • https://cdn.sqhk.co/mazinatefoso/ttXJhaw/sigifuwizu.pdfIn PDF document text
    • https://cdn.sqhk.co/dabigewom/ifCwgda/97430395453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_60485c5668490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416796/normal_602b8a9fecdce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_5fd81f69627b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_5fd3db6b8e148.pdfIn PDF document text
    • http://punejew.mygamesonline.org/fedex_canada_tracking_customer_service.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/seroke.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
    • http://xadifoduboboriv.rf.gd/66053468735.pdfIn PDF document text
    • http://pijofabuzipa.rf.gd/aws_firehose_lambda_transform.pdfIn PDF document text
    • http://vafukibugaf.epizy.com/good_night_image_with_love_couple.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/tebukidibekus.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/vikifezukosoxasan.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/tuzadejizamo.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/sukugili.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/cambly_apk_premium.pdfIn PDF document text
    • http://vizepojuduw.rf.gd/xorotunumelugiguvugu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 5324 bytes
SHA-256: cf6d8ef5eca420c15ab08f992299206fceb64aab8f97a0607aa187d1fc01e33b
font_01_sfnt_off000128c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C9 11120 bytes
SHA-256: bbd5bce5d3226b70fc8ace3cfe8cebfcbf9b4f2fff45e769ee15e74c32be3713
font_02_sfnt_off00014ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176