Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b50476c9fdc0e4…

MALICIOUS

PDF

82.6 KB Created: 2021-03-24 16:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: da0c355b2d471b3a6537a542dbdde657 SHA-1: 9acb040c7d0d46558bdc558127f6f4c1a42c12bc SHA-256: e0b50476c9fdc0e43613d300c2879428c176e55683ec4afb00d3d0f820d1e0c5
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, and at least one known malicious redirector. This suggests a phishing or scam attempt designed to lead users to malicious content. While no scripts were explicitly extracted, the heuristic firings strongly indicate malicious intent related to link manipulation and redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=give+answer+then+pull+back+crossword+clue In PDF document text
    • http://dazolovegom.mygamesonline.org/wd_tv_hd_media_player_firmware_upgrade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5fcd78b6f07ff.pdfIn PDF document text
    • http://ubsvp.com/buribefirewiz0m5cs.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/pyMghRJ/unity_2d_endless_runner_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/hjk0hca/79400817233.pdfIn PDF document text
    • http://tk-time.site/democracy_dictatorship_monarchy_worksheeto7mif.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/hjrihjg/aquatic_scourge_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/hfLgdhh/censor_sound_effect.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488855/normal_5ff925a67a5fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b92320d-a4ea-4935-9f6f-cdbb26da585e/focusrite_scarlett_2i4_manuale_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b26cfb-3f87-4304-baf2-c6906ab00c26/stories_to_read_to_your_unborn_child.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_abc8445c20eb475ea3c13983adadcbfa.pdf?index=trueIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_f4c58dfefe0145b7a8ba61289af4e4e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5c909e-607b-4b65-95f7-50b3b9823811/monitor_de_signos_vitales_funcionamiento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea198868-4359-47b6-a01f-97a89a816143/botosozufalixisutikavupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca550dd-036f-4e31-afa2-609f9d9d2810/kepunafuziponolipupe.pdfIn PDF document text
    • http://baletax.onlinewebshop.net/what_is_the_throne_of_glass_series_rated.pdfIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_1f2aca6806e34e0bb5123f0fb16a4d46.pdf?index=trueIn 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_off000104bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BD 5548 bytes
SHA-256: 91c76fe53d46019791a41a682c17c4dee89b4a57bf7318a4a28c65d6ab27c5cf
font_01_sfnt_off000117a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A6 11064 bytes
SHA-256: 3cf76128199c00a753f90a7d3f04c384fbd5531b80b1d369ac6cfbc34b1bcf31