Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d10ed2c15d68824…

MALICIOUS

PDF

81.6 KB Created: 2021-03-24 01:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7e28ebc2f87cc808aae4cf32327d6a2f SHA-1: d1f3a6625b62524d97642e307cc56b520e7181bc SHA-256: 1d10ed2c15d688246517b84a5e3ec94f33ea60e3075fd66fef3b21bcaf0f0f0b
192 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, with one explicitly identified as a malicious redirector. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to direct users to harmful content. Although no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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
  • 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=befikre+full+movie+hd+video++pagalworld.+com In PDF document text
    • http://zoxowopivuk.iblogger.org/ancient_magus_bride_ruth_english_voice_actor.pdfIn PDF document text
    • https://ginamelemu.weebly.com/uploads/1/3/4/6/134624442/jelalul-xurisoxewo.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/stainless_steel_microstructure.pdfIn PDF document text
    • https://dulupuwo.weebly.com/uploads/1/3/5/3/135393712/9787800.pdfIn PDF document text
    • http://delinapod.mypressonline.com/how_to_write_a_community_needs_assessment.pdfIn PDF document text
    • http://fepefamegutasoz.iblogger.org/11520568346.pdfIn PDF document text
    • http://wugumonisukanib.sportsontheweb.net/robulenu.pdfIn PDF document text
    • https://gupebuxoguwev.weebly.com/uploads/1/3/4/3/134381402/pavulexukuveg-vufuzoxi-mutab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://kemesid.onlinewebshop.net/sound_of_silence_disturbed_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90956fd4-998f-4e68-b0e8-3ee7537efb55/18880802920.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_8e6bb4bc33504084a72d1cecba1ee022.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/909a8abc-77b1-483e-aee2-54d715161250/barapisitivunipudinuxaz.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/vofarat.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/how_to_write_a_good_script_for_a_tv_show.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_e9af0440cb664972bb4f9bedced3d87b.pdf?index=trueIn PDF document text
    • http://duliwijedij.rf.gd/what_is_lattice_in_solid_state_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d64ec3-7854-466b-a598-d81171e69f58/mens_fashion_jumpsuit_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/36196071088.pdfIn PDF document text
    • http://kititone.epizy.com/bitlocker_for_windows_8._1_filehippo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8680c957-7090-4186-80a6-7ff171bf27fd/norcold_rv_refrigerator_error_code_n.pdfIn PDF document text
    • http://pejefovad.epizy.com/saucony_guide_iso_10_damen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c72f9b9f-09a1-4ca8-afb3-aff54a5e2af5/votariniwaribabedoluxuza.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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 5688 bytes
SHA-256: 9812afc6f9b4da958a09fd64b17748fbc665e2b4f2482cfe417f7864f2acb871
font_01_sfnt_off000103ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 10716 bytes
SHA-256: fd79668e8b4354a06745681f6afb9a3e0dd41b5061dd5356fe9e788145a447ec
font_02_sfnt_off000128e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E3 3504 bytes
SHA-256: 71e785623aff54ef142ff5d41127fc5ae5766890bb4f709ebafe4492e54561e1

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