Malicious PDF — malware analysis report

Static analysis result for SHA-256 1328ea047560cc18…

MALICIOUS

PDF

77.2 KB Created: 2021-02-05 01:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 55ebd0a015ca108134b50517f521f0b1 SHA-1: bfff248fc2521bdcc3f14d7a85c47f0e3c2f479f SHA-256: 1328ea047560cc18142db87c425c15e1a8903d5de81ef269a1360ba4a3cfacca
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to disposable domains, a common tactic for phishing or distributing malware. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'crophysi.ru' as a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of suspicious links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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=note+3+straight+talk In PDF document text
    • http://discovljzg.fun/11796264244zacw7.pdfIn PDF document text
    • http://lavka-karamel.ru/wobusarogorupeluvipezijtdpch.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/library_shelving_test2adf6.pdfIn PDF document text
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/4066533b61e4.pdfIn PDF document text
    • http://arevakar-travel.com/91355517450phtsc.pdfIn PDF document text
    • http://feelslike35.com/7615548638640x0h.pdfIn PDF document text
    • http://tameenegypt.com/wood_cnc_machine_for_sale_nzdwojl.pdfIn PDF document text
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/kutawenuduw-waxugowivabuju-minajemukeru-bumodapu.pdfIn PDF document text
    • http://parralax.net/74495009557k5ss1.pdfIn PDF document text
    • http://unreguezff.rest/mopome6d3er.pdfIn PDF document text
    • https://busuguzokiw.weebly.com/uploads/1/3/1/4/131406797/7153042.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/tuweli.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/daweguwuleavk96.pdfIn PDF document text
    • http://reduslim-italia.website/18393345974hrz7t.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/house_music_radio_stations_nycayg1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/kakitadifexel.pdfIn PDF document text
    • http://zewogukanonudut.epizy.com/bugdom_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/java_resttemplate_interceptor.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/netherlands_visa_application_form_pakistan.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 5144 bytes
SHA-256: 6d50631c298044a1a756e8429852fb7005f2fa45513834964a4a94448e8fed07
font_01_sfnt_off0000f5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B3 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off00010117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10117 11100 bytes
SHA-256: 1927ece55f9c7455c99c5c6dc25ca7a91caf8f7714c8c96789c8a0df4f809768

Open this report in the interactive analyzer, or submit your own file for analysis.