Malicious PDF — malware analysis report

Static analysis result for SHA-256 970828c44c84646e…

MALICIOUS

PDF

95.0 KB Created: 2021-03-10 10:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1e3de6065cfbb25cd80cf6dfc4e23a8 SHA-1: 58d1a27dbf317c8c6cc759b429fcab230b34a7ca SHA-256: 970828c44c84646ec3f8b42b91c506fb6bb2a16fbbabd05b2eb34a25fd7588c1
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external links, 'http://com-copyrighit.com/litawizuxp1k5.pdf', is part of this farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure suggests a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://ponafet.ru/award?keyword=allen+test+papers+pdf+neet
    • http://com-copyrighit.com/litawizuxp1k5.pdf
    • https://lutaxabivuk.weebly.com/uploads/1/3/0/7/130740512/77e61bf78.pdf
    • https://xudorelaguf.weebly.com/uploads/1/3/0/8/130813521/gosudenetunoz.pdf
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/62e75cbe3f1.pdf
    • https://juduloto.weebly.com/uploads/1/3/5/3/135323899/199c5b32414.pdf
    • http://wexypay.icu/sejajipur6u2qa.pdf
    • https://jekufagiz.weebly.com/uploads/1/3/0/7/130739150/dewenopemutefaf-xenufo-nejiseze.pdf
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/zamiwakedeluz_zesorof_ziputufore.pdf
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/ec8946af6de3e.pdf
    • https://babiweperes.weebly.com/uploads/1/3/5/3/135347107/f3c2864ea1e.pdf
    • https://cdn.sqhk.co/pifonode/jbicA8n/atlantic_city_airport_long_term_parking_fee.pdf
    • http://copyright-infringement.business/ammonia_in_drinking_waterjiwx1.pdf
    • https://ruponijipatom.weebly.com/uploads/1/3/3/9/133999380/wivag_rujeme_novebujodawawis.pdf
    • https://wunilozufepen.weebly.com/uploads/1/3/4/6/134600637/bivumiduwija_tagujaxumebaw_polepinusope.pdf
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/bivavis-wusulaxuke.pdf
    • https://vakurizilobiwil.weebly.com/uploads/1/3/0/9/130969742/8002738.pdf
    • https://cdn.sqhk.co/feguzuvubut/e9LGjih/storm_lake_ia_50588.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vebogotexaf/porcentaje_de_cesareas_en_mexico_2018.pdf
    • https://s3.amazonaws.com/nakuzafol/family_timeline_template.pdf
    • https://s3.amazonaws.com/bewibiwat/anne_of_avonlea_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d65.bin
079469962ef1531a38c39bf82da7c5e57359eaa47654f3c2f844fe49e926dac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D65 4652 bytes
font_01_sfnt_off00013d34.bin
b0060505134157998100cdfd50ff1535857b90bec88bdb2149d533abb790b9fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D34 10396 bytes
font_02_sfnt_off000160a7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160A7 4324 bytes

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