Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59d1414d1b7d184…

MALICIOUS

PDF

75.9 KB Created: 2021-01-19 19:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9edf295265a2c07ed06656b3b26f50e9 SHA-1: 5c935714182613a5adaa7ffae54d52b3c3fcba84 SHA-256: b59d1414d1b7d1842fbf6dace9fd3c2e7fbf51f2ecdcae26d671c585058c17a4
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://traffking.ru/aws?utm_term=manual+shrink+wrapping+machine+for+bottles PDF link annotation
    • http://rerulekoba.66ghz.com/adani_power_ltd_annual_report_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/nobegasosev/ghCigXF/help_annie_game_over_man.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/i6EjjM6/zutori.pdfIn PDF document text
    • https://site-1173408.mozfiles.com/files/1173408/aruba_clearpass_configuration_guide.pdfIn PDF document text
    • https://kafememum.weebly.com/uploads/1/3/4/6/134616831/tonaf.pdfIn PDF document text
    • http://pevojatinolotej.22web.org/rixobugomisakadobuse.pdfIn PDF document text
    • https://site-1178370.mozfiles.com/files/1178370/47963134648.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/38388.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/dd7fbf1364f6623.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/satudifin/candy_crush_saga_game_apk.pdfIn PDF document text
    • http://merizipu.rf.gd/sugazawavafafini.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/31839773137.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/99721855319.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/bovetogafev.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/bepopaze.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/29776606787.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_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 5728 bytes
SHA-256: 5e7b8ebe8f01e46667af877227994e2ee8573ffc6e40fd78dd269220761f17c1
font_01_sfnt_off0000fba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA0 11320 bytes
SHA-256: 06baadcb96a7d1a06874e9767ac9d24d3896d50c05d1aa53f6e41befe6beb4c4

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