Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9f2dc2e64ec5ee…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 22:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fb68f6ab0bce1c19e905252866e59a22 SHA-1: dff780c4af38f8c94067554c01a0b6e12b2499c1 SHA-256: ae9f2dc2e64ec5ee7555080a39b89a31a73b6fd322865e8a3e09a1c95b5e902c
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links on disposable hosting suggests a phishing or scam attempt designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://dafemum.ru/award?keyword=malformaciones+congenitas+pdf In PDF document text
    • https://cdn.sqhk.co/gobuwovuv/Lic5sOP/bogositenodebikeje.pdfIn PDF document text
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/403d5bbb.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/povufisizoguvrpalw.pdfIn PDF document text
    • http://momivegod.22web.org/how_can_homelander_die.pdfIn PDF document text
    • https://vetepoxep.weebly.com/uploads/1/3/5/3/135302771/forebaj_garafivekozudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_603a66b4bc2c7.pdfIn PDF document text
    • http://life-news.tech/manovugevurorigomhdm.pdfIn PDF document text
    • https://jakipafowikodo.weebly.com/uploads/1/3/1/0/131070805/pavuz.pdfIn PDF document text
    • http://whitetwo.space/python_artificial_intelligence_projects_for_beginners_download5mcg4.pdfIn PDF document text
    • https://ruvedusipokowu.weebly.com/uploads/1/3/0/8/130813644/mafojozavuru.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/NUgdijw/karaoke_voice_sing_and_record_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/funixatugesi/haR5YR4/45513503926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_602f0961cae4d.pdfIn PDF document text
    • http://stakingyfi.com/graphing_linear_motion_worksheet_answerstzy24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_60132c7741eb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e69f8cd8-28bb-4a40-bdee-46997c37366d/what_are_basic_survival_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64d4909-d978-42a9-8b2e-0969b67000a3/what_size_is_30_x_60_cm.pdfIn PDF document text
    • http://sobikunukozi.rf.gd/tuwamadepagexatetonetujov.pdfIn PDF document text
    • http://sojeveme.epizy.com/what_is_the_best_pole_hedge_trimmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491e917b-5404-4c6b-9d24-6b95672d0d87/4173959601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e55e968-276f-411f-ae31-f9726a188025/how_to_control_practice_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/135b4472-34c4-4141-9c47-8471f214a595/22444738090.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28E 5268 bytes
SHA-256: 280b560b1e4da86b9d42ff5502a08db1e44d3f83b7d2374e82816a921d3b1ffd
font_01_sfnt_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 11288 bytes
SHA-256: ded99bdf7ce441eea4853b1cceae19250c01335a7bf37486c1a0cfb496d0dcb6
font_02_sfnt_off00011957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11957 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230