Malicious PDF — malware analysis report

Static analysis result for SHA-256 996cb0ade3cc01e6…

MALICIOUS

PDF

83.3 KB Created: 2021-03-01 20:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 345ef45041aeb9ad68ae27dc0ba0add1 SHA-1: 731070a61b2f8cbd126668eeb61d91d377834e4f SHA-256: 996cb0ade3cc01e6516b455c72a9df54f2b1f7188d8878e565caf74347f2713b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a link farm, suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or content-distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=blackmagic+design+atem+mini+pro+4+hdmi+live+production+switcher PDF link annotation
    • https://tudadakamoziv.weebly.com/uploads/1/3/4/5/134596668/tupatefaru_xekamix_zupobasaropema_rusugopoxoxuse.pdfIn PDF document text
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/0583ebf106e3eaf.pdfIn PDF document text
    • https://vemugalibi.weebly.com/uploads/1/3/4/4/134484787/disojefanex-sudomalofalazew-romakufo-xelosurepegiv.pdfIn PDF document text
    • https://maritomumotoko.weebly.com/uploads/1/3/4/5/134512683/e6e436e2e09cd3.pdfIn PDF document text
    • http://winsl.space/nonopelazomapiwap7dcn9.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/gelirob.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/sixolose/dijidax.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/23422971986.pdfIn PDF document text
    • http://nijopupeboxisa.epizy.com/71693045232.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/can_you_watch_the_night_manager_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/venokuvemeruvuni.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/73274433003.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/rabonimakexerijidag.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/36810100099.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FE 5840 bytes
SHA-256: 65b3e7538ce533e7e4c4c12bec0db096af597c639017667cc758adc9dbc2c156
font_01_sfnt_off0000fbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCE 14656 bytes
SHA-256: d66d14c92d54d2541ffd65429924e08e52f6dc33b2eb7145a582554ed2bcd998
font_02_sfnt_off000129cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CC 16164 bytes
SHA-256: 296c99dc130b3e9dec9c0ff2743aaacb71c13c9fc424d08251ed5e907fa2c3b3

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