Malicious PDF — malware analysis report

Static analysis result for SHA-256 176a279f33db11e4…

MALICIOUS

PDF

107.3 KB Created: 2021-03-15 01:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3de47d918f0caf933986108ee09d64d3 SHA-1: cd26c22b9ce0684c83dc531458c06abc065fcbc4 SHA-256: 176a279f33db11e4f900385db31752bfe941122d4ec630f649ceec165928ef6e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://zajinet.ru/wix?keyword=1998+ski+doo+owners+manual PDF link annotation
    • https://gotedimonov.weebly.com/uploads/1/3/4/7/134761190/3480674.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/google_balance_sheet_2020.pdfIn PDF document text
    • https://tusemebi.weebly.com/uploads/1/3/4/3/134316443/zejat_jegifekever.pdfIn PDF document text
    • http://bukenisefino.mygamesonline.org/15813930700.pdfIn PDF document text
    • https://burojupudigi.weebly.com/uploads/1/3/5/9/135990051/fodigasixukuv.pdfIn PDF document text
    • https://juwufugoxeza.weebly.com/uploads/1/3/4/5/134528381/c7b5f6e5eee7.pdfIn PDF document text
    • https://vizefibamoraxob.weebly.com/uploads/1/3/4/6/134613498/6062162.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/wu_tang_clan_song_cream_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/gazikukodepuwimejeb.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/ultrasound_guided_genicular_nerve_block_technique.pdfIn PDF document text
    • http://zerakunutage.epizy.com/73407167016.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/borerebonipepagumojad.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/kendo_mvc_multiselect_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/pavitra_bandham_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/zevafovatubepegugabakolug.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/descargar_google_adsense_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/87171297485.pdfIn PDF document text
    • http://gegavolaful.epizy.com/java_1._7._0_75.pdfIn PDF document text
    • http://muzulozak.atwebpages.com/computer_science_first_year_book.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000167b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167B5 5436 bytes
SHA-256: 49c2f351869f153900c59579720d8d64515cc244e1777e7e8665b53c1b7b4220
font_01_sfnt_off00017a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A27 10864 bytes
SHA-256: 81118ab646574401b142b2519e70fbddc6450d6cc2ba522c25d056fc13095832

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