Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1bcad57329c38f…

MALICIOUS

PDF

152.6 KB Created: 2021-04-04 01:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e3c920f21c1d72eb7a1c5b42f911995 SHA-1: 56ccc3e9409de39990c0280897afcf6621119b7c SHA-256: da1bcad57329c38f46a51dbd11ec4ef5f498b9536ac5cbe08f888e6873bdd249
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://fokemale.ru/123?utm_term=antony+and+cleopatra+translation+pdf PDF link annotation
    • https://cdn.sqhk.co/gagufatemo/Tgfjerj/28010908628.pdfIn PDF document text
    • http://hairhome.moscow/2000_ford_ranger_radio_diagram44shv.pdfIn PDF document text
    • http://hydrofthol.space/2484713927x2aub.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/74885014354.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/7u29r58/star_wars_squadrons_release_date_oculus_quest.pdfIn PDF document text
    • http://raruranakadup.iblogger.org/electricity_year_4_worksheets.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/mabojajofiguvoza.pdfIn PDF document text
    • https://dibozuvoba.weebly.com/uploads/1/3/4/6/134692955/ec506.pdfIn PDF document text
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/44855.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/bZhhcia/21931224000.pdfIn PDF document text
    • https://tosulabemolajeg.weebly.com/uploads/1/3/1/8/131871730/7093274.pdfIn PDF document text
    • http://sasawavivar.mygamesonline.org/66063321495.pdfIn PDF document text
    • http://juvugewit.iblogger.org/fusuxizawunemebanimigeb.pdfIn PDF document text
    • https://bedejoxinen.weebly.com/uploads/1/3/1/1/131163540/biforazaruwenev.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/keto_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/Tsij4gg/siturupubif.pdfIn PDF document text
    • https://suvenalopevoku.weebly.com/uploads/1/3/4/5/134510495/7720963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wajalapivibobi.epizy.com/post_multipart_form-_data_application_octet-_stream.pdfIn PDF document text
    • http://takerowul.epizy.com/what_is_integration_in_maths_in_hindi.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/curriculum_vitae_download.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_off00021c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21C5C 5240 bytes
SHA-256: d28ab3c782e7e68bd2b64f0ee3596bc893659d4398907717ebbbc9eda2761b04
font_01_sfnt_off00022e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E4E 11352 bytes
SHA-256: 356e26ff2e3f3f540cd0574769e854dedc7ec74591cd512a6f020a467e1dcf10