Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a14da29dae4a09…

MALICIOUS

PDF

178.7 KB Created: 2021-03-24 19:49:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc18f05d680f650ea9511d40699a2868 SHA-1: ee0e67947525bdc83fb131e2e4ee4cc9a9861536 SHA-256: 39a14da29dae4a09f43a1c126d344dca4488ea847561696fe3003361d294f68c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many hosted on disposable domains and employing UTM parameters, suggests a phishing or scam campaign. The 'SE_URGENCY_LURE' heuristic further supports this, indicating the document likely contains urgent language to prompt user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://resalured.ru/123?utm_term=chinnamma+jeevitha+charitra
    • https://static.s123-cdn-static.com/uploads/4369923/normal_5fc6f71f32ddb.pdf
    • http://laludinemolat.sportsontheweb.net/defy_your_limits_the_telekinesis_training_method.pdf
    • http://nonoxutiwi.mypressonline.com/13776104954.pdf
    • https://cdn-cms.f-static.net/uploads/4493227/normal_60354a2f507e3.pdf
    • http://watogoda.mypressonline.com/nepifu.pdf
    • http://dekovag.mypressonline.com/36130457775.pdf
    • http://kitazixozakabu.sportsontheweb.net/bible_history.pdf
    • http://mapenibo.scienceontheweb.net/7332370524.pdf
    • https://cdn-cms.f-static.net/uploads/4485587/normal_602dcbe371eb4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/8f88c693-2da9-4aca-a401-d0db678ab603/what_type_of_note_gets_4_beats.pdf
    • http://widusop.atwebpages.com/materi_retorika.pdf
    • http://pigumomibi.onlinewebshop.net/actinides_series.pdf
    • https://uploads.strikinglycdn.com/files/d23378d1-ed90-4171-bdb4-435d2baa7025/31034332284.pdf
    • http://gudukiderunusu.myartsonline.com/anatomia_quirurgica_del_cuello.pdf
    • http://tiruweditivunaw.myartsonline.com/nuzavoxafogobuluvesebaz.pdf
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_5869e9ade7214457beefee2bae25e3b6.pdf?index=true
    • http://rabatelekovufar.myartsonline.com/zonitila.pdf
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_13139c2537c24645b032e8b2ae5d0cfe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4a0d4904-c26c-4397-954f-d8f13923f03d/marvel_avengers_infinity_war_thanos_gauntlet.pdf
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_e30e6e31106b4714a5374a18be781946.pdf?index=true
    • https://cdd249b8-77b1-4a94-b024-8995efe4d959.filesusr.com/ugd/d394ff_be793de392cd4513b4b137067369a831.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025d9d.bin
3fdde0e6da0238252670028e0d1f6eb0c90287f3ebaac21f032152d8794e52be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25D9D 4872 bytes
font_01_sfnt_off00026e00.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26E00 3720 bytes
font_02_sfnt_off00027963.bin
f5f6d934a4a719c76a7990e0f84a2835d7a3c6d5bc688ec94d2e661d84e33f5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27963 11144 bytes
font_03_sfnt_off00029f91.bin
cfdb16a390759273df258b6e6f114d269fc7dd7c8766fa9f54bf0b8fe1ed71c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29F91 8452 bytes

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