Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1fb9ea381c980a…

MALICIOUS

PDF

76.3 KB Created: 2021-05-05 13:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 32b5005c11d38757131abc73b31f0347 SHA-1: 72464f9b1f9dcaf73c5b5132a8876dfc65643ed1 SHA-256: bd1fb9ea381c980a9e290e70b95167391e4c06b2933c7d5b055886b6a2e40e60
156 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 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://jottigo.ru/strik?utm_term=o+que+%25C3%25A9+titulo+de+credito+improprio PDF link annotation
    • https://tuxabonelunod.weebly.com/uploads/1/3/1/3/131379680/pabuju.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/87953282123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421350/normal_5fff0cc66b9f4.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/mcgraw_hill_connect_customer_service_number.pdfIn PDF document text
    • http://mitefakosutupot.22web.org/actos_de_comercio_y_sociedades_mercantiles.pdfIn PDF document text
    • https://lolinukopo.weebly.com/uploads/1/3/4/3/134351434/ginapegeba-xokoweve-saveluze.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/82678630480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_6035ee562fe65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473656/normal_5fcebe8d24ead.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/jukoxisojow/pupiborutuxikadigi.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/eureka_lightspeed_vacuum_4700_parts.pdfIn PDF document text
    • http://surobufalinaxis.epizy.com/35984260469.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/gorogoxiwaranizep.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/puzzle_alarm_clock_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/what_is_the_fastest_method_to_solve_a_rubiks_cube.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/dell_poweredge_r710_power_consumption_watts.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/37671896821.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/fb_lite_free_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/dupevuxek.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/cajamar_app_android.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_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 5128 bytes
SHA-256: 3a18afce14f40de98a416e7bbea8f618ed0d619cddca795fb5c87b7837cce693
font_01_sfnt_off0000fc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC24 11596 bytes
SHA-256: 8c1f10249b363cf48e210f24323c7655f720fb07cbedcf0c4b8fd843f4a94411

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