Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb38bacd0cca02e…

MALICIOUS

PDF

71.7 KB Created: 2021-03-20 08:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c4881661ae93bf7d636db0ffca9cf50d SHA-1: 55e4753cf22f55b7da702fdbbcbdcbee8c1eaaa9 SHA-256: 5eb38bacd0cca02ed92be841d8c3463499b8c60fe5b6c6e37ea7ece134120a16
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9991

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/123?utm_term=aver+information+vc520+daisy-+chain+speakerphone PDF link annotation
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/8931833.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/welukad-bovupusuz-nepajubafogol.pdfIn PDF document text
    • https://sumulepali.weebly.com/uploads/1/3/4/8/134882140/3598293.pdfIn PDF document text
    • http://rifivejawix.22web.org/88502111307.pdfIn PDF document text
    • http://remontvorot24.com/92523177381htnku.pdfIn PDF document text
    • https://mawikimame.weebly.com/uploads/1/3/4/2/134235565/ae9e7c73a766b7.pdfIn PDF document text
    • https://lobalose.weebly.com/uploads/1/3/6/0/136089755/9665016.pdfIn PDF document text
    • http://jonusawa.iblogger.org/graph_paper_template_for_ms_word.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/remington_700_bdl_30_06_synthetic_stock_for_sale.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/simmons_rangefinder_battery.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/22202283716.pdfIn PDF document text
    • http://maximizator.online/watch_hbo_max_on_roku_hack0nctw.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/51078386589.pdfIn PDF document text
    • http://nebo-baikala.ru/patal_bhairavi_full_movie_3gpx3ss8.pdfIn PDF document text
    • http://alphabitx.com/digonitepemevigilazuhbljq.pdfIn PDF document text
    • http://yblda.fun/tuzavelowofisiker200dr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_8d3b6e5c2ac2441fbe50d98b3ec70d2e.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_fe91a4418e74405f9306c69df9e925b9.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_ba545104968d4a7abe2e706b59ce1853.pdf?index=trueIn PDF document text
    • http://gemawinikifiv.myartsonline.com/25991897620.pdfIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_8745b3764f624a529dd2c6d590e54b21.pdf?index=trueIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_fa7ef1fec1e142928ca59da6ac55c5f9.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_f26aff9f57ff40f78fa21e4298ba172e.pdf?index=trueIn PDF document text
    • http://bikikifuxax.epizy.com/23102088345.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_63212594218243e78c49a9b61bec9fb6.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_off0000d69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69E 6008 bytes
SHA-256: d7e430b4c51eab7c89d79dba22f1d51aa1879af9ef24499ee1f7d0cd289dd170
font_01_sfnt_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 10512 bytes
SHA-256: 5aa00410b8e4aa196793a062e1e24d00306966c53035984c96c40a211ccd7824