Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26accc5f8a42d24…

MALICIOUS

PDF

76.0 KB Created: 2021-04-03 14:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 845d41027e20607e2ac18f13abb249ab SHA-1: d1d4bb7436e00250d0e6c8173d8618d654a3df1e SHA-256: a26accc5f8a42d24bb2ebe7756421a1e1994dc1df8e52f11c030ecb4e13d5591
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to 'Excel calendar 2019 monthly template' and 'wkhtmltopdf', which are likely pretexts to encourage users to click on the embedded malicious URLs.

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://vilenefex.ru/123?utm_term=excel+calendar+2019+monthly+template PDF link annotation
    • https://cdn.sqhk.co/lekusovu/bJZQsQe/wojiw.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/zujirepowej.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/1idjfgi/6791238001.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/fuxagusaxabarezoje.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/aboriginal_symbolsr1xiq.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/igqjjfK/fezodaxivefe.pdfIn PDF document text
    • http://gufutaca5.xyz/52_week_money_challenge_10000gv580.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/8tGieVo/baxativof.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/wuvepilamamuse/xidukixovi.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/vpn_crack_apk_onhax.pdfIn PDF document text
    • https://b0837e58-6fb0-4b2c-a83d-c451c4d85cc2.filesusr.com/ugd/1169b1_6ffc087905a24c50b54f500f05c2fc4a.pdf?index=trueIn PDF document text
    • http://wawavaroxu.myartsonline.com/british_council_lesson_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/91188232299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df683220-46e2-4f2a-b598-f1206660a3bc/frigidaire_mini_fridge_retro_1.6.pdfIn PDF document text
    • https://a6132035-7465-4fe4-be4e-2faa96c22dab.filesusr.com/ugd/cf950b_3e043fb7b7b9490eae981a7dc4b2c793.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vojapu/why_are_there_2_divine_mercy_images.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/55139104925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bde0f0-9836-495d-bfe8-c4c8ddab1c6a/55077691505.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_c7752254ca724f77b682fd2bef4a737a.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_off0000ec5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5A 5744 bytes
SHA-256: 5e71136d7a70d4f16e8ca1fb15cb1126b4847a65eba6ffe4cd6fd5e7351f6f80
font_01_sfnt_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 10128 bytes
SHA-256: 174742f3cc1baa8ea21f0687e0d3eb3512842b6e9f205d5858d9e3162d2d00fc

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