Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc2248709cf1077…

MALICIOUS

PDF

82.5 KB Created: 2021-03-18 20:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 03a9dad350f04304251f0cb2090f1c3f SHA-1: 5ddcbc2f6cb2861d43f697722ea7eaf490ebb4ec SHA-256: 0cc2248709cf1077db47f38a9160adc8f77c0054e1ebc0dc4d10bfc107154fe5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/award?keyword=concierto+barroco+alejo+carpentier+pdf PDF link annotation
    • http://fepaporipevari.mypressonline.com/51925681021.pdfIn PDF document text
    • https://dibevoxatatot.weebly.com/uploads/1/3/1/1/131164568/favevixufalanatu.pdfIn PDF document text
    • http://kozizukexepuf.22web.org/fubakupepiladun.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/1d947630c7088c1.pdfIn PDF document text
    • https://videxopejevis.weebly.com/uploads/1/3/5/3/135333638/8974683.pdfIn PDF document text
    • http://namibav.iblogger.org/alter_ego_b1_hachette_download.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/napuj-majunotivusise.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lodakakurozakod.epizy.com/adobe_reader_for_android_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf48888-34a6-46d4-9ed8-a0c115a8f4dc/vevidurebuni.pdfIn PDF document text
    • http://luregaw.onlinewebshop.net/80880436002.pdfIn PDF document text
    • http://jipokogave.epizy.com/60119877348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f4de073-a20b-4b73-968e-649a963a075c/kitchenaid_professional_600_parts_canada.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/50134080374.pdfIn PDF document text
    • http://doninedu.epizy.com/chrome_apps_for_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a69787d-7e96-429e-b8e2-a6283a56944d/albert_einstein_books_in_hindi_download.pdfIn PDF document text
    • http://gigitepusiligo.epizy.com/tensile_test_lab_report_errors.pdfIn PDF document text
    • http://jopubijako.atwebpages.com/82016472709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c421c6-f690-4cd7-b9f7-28e3d5efcc20/is_a_bosch_dishwasher_worth_the_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/311e43f6-5466-494d-9832-16e382e11a71/vobikorawodelikazekune.pdfIn PDF document text
    • http://tumofif.rf.gd/advanced_d_d_unearthed_arcana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56b34e9f-b572-4959-9d7c-ca66fa690519/chevy_malibu_led_tail_lights.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_off000101d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D6 5092 bytes
SHA-256: ec0c53d47eda13ffa519ab53e7f8e1a5a7509becaf2827cccdee6a6b2438fd61
font_01_sfnt_off00011335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11335 12992 bytes
SHA-256: 9b643396df2a994996431dba3e93b2fc38646f40db95962a494cdcf4f8a0acd7

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