Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6f69a5b388e7dd…

MALICIOUS

PDF

86.2 KB Created: 2021-03-09 21:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 020423d70f81035b3f7ca79400b799b3 SHA-1: dd684ce76c2fdece25ac4f5b63ff71925cc3d28f SHA-256: 5d6f69a5b388e7dd2af05d1dadd8729e581b15cb66c486bd0bb8cc33221b0176
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to host many links on disposable domains, likely for phishing or malware distribution. The embedded URLs point to suspicious domains like soxebez.ru, indicating a probable attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://soxebez.ru/award?keyword=statistical+models+and+methods+for+lifetime+data+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5ff8afd4e5288.pdfIn PDF document text
    • http://godubumoze.iblogger.org/bike_race_mod_apk.pdfIn PDF document text
    • https://jizojalagakamu.weebly.com/uploads/1/3/4/8/134886497/kisifevege-mamenivaxojuj-sojofize-fidunef.pdfIn PDF document text
    • https://temerineg.weebly.com/uploads/1/3/0/9/130969052/rurofagedubefi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445550/normal_5ff5340857429.pdfIn PDF document text
    • https://piwevowukitibe.weebly.com/uploads/1/3/1/4/131454699/mupuwo_funikebewuk.pdfIn PDF document text
    • https://vusuranozaxo.weebly.com/uploads/1/3/4/0/134012668/e5cdf3cbf.pdfIn PDF document text
    • http://jiwitoletazadag.iblogger.org/surah_al_mulk_merdu_wanita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_6040a57b235d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xanijidul.epizy.com/26665820800.pdfIn PDF document text
    • http://tekoboworitutew.epizy.com/nanotemolexakitulesulunaw.pdfIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_6d8d986526bb4bd68364d76600d2635d.pdf?index=trueIn PDF document text
    • http://podisiwabexuran.rf.gd/1041919633.pdfIn PDF document text
    • http://raxuwalof.rf.gd/23449746399.pdfIn PDF document text
    • http://mewozukejos.rf.gd/how_to_bookmark_files_in_adobe_reader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2ba461-c111-4928-abb8-8bb8166f041a/nalilexuz.pdfIn PDF document text
    • http://fapisab.rf.gd/95067433119.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_548b30149a874d5da24909439fbf1501.pdf?index=trueIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_1e1a0f83df2a40da9b3881040e44f978.pdf?index=trueIn PDF document text
    • http://duxasowasosa.rf.gd/xadeke.pdfIn PDF document text
    • http://napepezubebefiw.epizy.com/waximeredo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/369a366c-c8f5-48ca-9bca-da44982f1203/o_come_to_the_altar_chords.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_off00011325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11325 5500 bytes
SHA-256: e0330be04ebae884d46f9ec01a7cde3de84cc224f673d88c6e8cfb82f450b344
font_01_sfnt_off000125a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A7 10884 bytes
SHA-256: 6fc9075339c52cb9b890a4cac1c99b92621eea747a7592535c4c0f383d6f2011

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