Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8f0bb22a09f25e…

MALICIOUS

PDF

80.5 KB Created: 2021-06-04 06:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 02e72ca3bdcc02c31e24b96318f235a7 SHA-1: 12b978eb1886774d8b516a9c3b44a0b2c9a2776e SHA-256: 4d8f0bb22a09f25e328e38ff56679cc1af53cb0af5a30f5a4ce17d2ec970c211
194 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a 'download' button lure and a high ML classifier score further indicate malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' confirms its classification as malicious, likely serving as a phishing or redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/123?utm_term=binance+ios+app++link PDF link annotation
    • https://tisawisapapaw.weebly.com/uploads/1/3/5/3/135326074/5d1e2b5d3.pdfIn PDF document text
    • https://fisuxujatuma.weebly.com/uploads/1/3/5/3/135345375/9081407.pdfIn PDF document text
    • https://polujififodujan.weebly.com/uploads/1/3/4/5/134512681/4a593cab31ed0a.pdfIn PDF document text
    • https://lobalose.weebly.com/uploads/1/3/6/0/136089755/migoxegab-wofonuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454671/normal_603136185b9a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_6044d1b84ae1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pebegijopolo.pbworks.com/f/recording_programs_for_pc_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f578a2-7067-47fd-8aff-6f8c094d2cb3/sosokamezidebare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6493744e-99cb-4c86-94ce-753022774ad4/two_examples_of_structures_of_a_literary_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2118ee1-ec12-472d-9782-c5cdab182eb3/driver_hp_photosmart_eprint_wireless_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95c6d07-4622-442c-99af-62260efa08b2/durolibalaxuverotadivevo.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/f/cant_download_origin_vcruntime140.dll.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f416e31-fa12-40a6-8c9f-effa79b0ad5d/json_tutorial_c.pdfIn PDF document text
    • http://sajateves.pbworks.com/f/how_to_do_a_hard_reset_on_my_iphone_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43354b91-e47a-4e05-9069-bd8e3c487022/9001_iso_2015_quality_standard.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144424077/guia_super_mario_bros_nintendo_ds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02092c78-9df0-45f1-8bf3-f4a41aa66e8b/tcl_32s327_32-inch_1080p_roku_smart_led_tv_manual.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/76192197990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6e3ebf-c284-4338-a243-4a8608d974d0/are_acer_laptops_good_quality.pdfIn PDF document text
    • http://fixiguru.pbworks.com/f/25669110508.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_off0000fdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 4944 bytes
SHA-256: 0080ffbc26782faa3d23e3ef9da02416a57c3caa6df6ab43b8c9b37825c0d308
font_01_sfnt_off00010eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB0 11164 bytes
SHA-256: 948c7e0313c3d323c7440c65546505c70d022e25cd8db6753690259431304983