Malicious PDF — malware analysis report

Static analysis result for SHA-256 995c68b3719102e6…

MALICIOUS

PDF

70.0 KB Created: 2021-03-03 04:17:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3fc07f7b85a65003b5dbd7ec0c71af4d SHA-1: aa176a5bcdc925c67d090f3325dfbb6502191431 SHA-256: 995c68b3719102e601bb0bc0c77d2589a149b04e5913f8c1111bcf67b4134b94
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, further supporting a malicious intent. The ML classifier and ClamAV detection confirm the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7986

Heuristics 4

  • 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 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
  • 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://jumiwimov.ru/wix?keyword=bsa+soil+and+water+conservation+merit+badge+requirements PDF link annotation
    • https://cdn.sqhk.co/zetuzire/8tQPrhh/22963555569.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/ha5VWjh/bike_racing_off_road_game_download.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/ropodewawabemaxolakemiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/Ohg2kif/steps_in_the_strategic_marketing_planning_process_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/suxidixip/ejajeq7/vawijab.pdfIn PDF document text
    • http://gesojepaxo.22web.org/python_3._6._2.pdfIn PDF document text
    • http://donbetosstreettacos.com/97449117027lo0lg.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/el_negocio_del_siglo_xxi_audiolibro.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/hjzidjf/94834636784.pdfIn PDF document text
    • http://terugate.mypressonline.com/singer_4423_instruction_book.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/jbTwghj/13070444621.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/4190060216.pdfIn PDF document text
    • http://kwini-fini.online/zarubuzedizubumuxivuvenipu1fq0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bivojeda.atwebpages.com/black_stone_cherry_the_human_condition_gold_vinyl.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 5728 bytes
SHA-256: 55b57508200ecfb8493be658a26707791348e74b10d92ff9a5fdc7521dec9e7d