Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0606c3c3ebc514…

MALICIOUS

PDF

81.2 KB Created: 2021-02-07 00:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e8269ef6db5390782dc7707ec77dc60b SHA-1: 17962acc9b69b0303116f303da260606a3361d22 SHA-256: ed0606c3c3ebc5145349f9c763dca0390625f74d7e421b40eb93ec67a9094cea
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating suspicious links and is flagged by a machine learning classifier and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to Kubota machinery. The presence of embedded URLs, particularly http://loginwithfb.site/lagegotofijirotvh6n9.pdf, strongly suggests a phishing attempt or a download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://druttle.ru/123?utm_term=kubota+manual+seeding+machine+sr-k610+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415308/normal_5fe9a0d56e6c2.pdfIn PDF document text
    • http://profaudit32.ru/xuzediwinijet50dte.pdfIn PDF document text
    • http://ferobuxanax.iblogger.org/6th_grade_math_textbook_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5ff788ebc2b51.pdfIn PDF document text
    • http://loginwithfb.site/lagegotofijirotvh6n9.pdfIn PDF document text
    • http://frankkyko.com/walmart_inventory_turnover_ratio_2020kitdz.pdfIn PDF document text
    • http://medicinfo.online/robert_s_rules_of_order_download70g6o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_6019163cd7372.pdfIn PDF document text
    • http://erethiztzj.space/gabed0dcn5.pdfIn PDF document text
    • http://3203epworthcres.com/67152993926bmy06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_5fe726a635ef3.pdfIn PDF document text
    • http://vsedlyatebya.xyz/zivewig1b86.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/dowadotiju/32996863205.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/92718380229.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/ubiquiti_unifi_add_access_point_manually.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/arizona_driver_s_permit_test_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 6040 bytes
SHA-256: cd5cfd4b97923be7dd768f7b4ddfb208a8a4ba137d92a080bd938882ad8ff197
font_01_sfnt_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 1908 bytes
SHA-256: 7ebb7fae05c1c5e3686aa4fb22557e8a2c3f44dbcf4224edbd4655e8eeabfc2f
font_02_sfnt_off0000fc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC77 10300 bytes
SHA-256: 756ae8d37c94de5615a26e0a867ecddfb8bf97b4bdc5b30605b628bda6200c6f
font_03_sfnt_off00011fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEE 16060 bytes
SHA-256: 9fce2e558c7eba93e9b4ba87b790c422cf9490aab73fe875614431ac3e7f116a

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