Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f275c1e7d97517b…

MALICIOUS

PDF

75.0 KB Created: 2021-03-12 12:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4e30e7232d552570f3b65e98f035e6d5 SHA-1: 12ffcd81d22ca4ca50e1cc78d8f865736d018288 SHA-256: 5f275c1e7d97517b00d16459232ae33ca49f0adbb52d4894722453029b322116
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://fokemale.ru/123?utm_term=excel+to+vcf+converter+online+free PDF link annotation
    • http://suxiselukex.66ghz.com/cnet_s_safe_site.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5fd85ae82f1df.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/the_most_famous_songs_of_all_time.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/savufatit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452846/normal_604781ebdef81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fd3194c9b12f.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/cnn_latest_news_on_the_election.pdfIn PDF document text
    • http://jupulapigivux.22web.org/85188862265.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mikijanux.atwebpages.com/jusavigoxoxov.pdfIn PDF document text
    • http://rawufukodonop.rf.gd/badikurumadofijaki.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/ladizididonez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a56f55-0fc0-4205-a02c-0b25c3417f7f/logitech_mk710_mouse_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b2323fe-20d3-4ec5-b2b8-b4b49f2d782c/how_to_paint_a_simple_winter_scene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfdf1b5-2adb-48cf-b351-a4f61f8deb01/25941877079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9c07b90-da82-4f2a-a1a4-6efbc8674ef8/12410196172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59d38eb-5ae8-4a67-ba5a-6f9471e40373/81732893255.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/boss_gt_100_patches.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/lg_g_pad_7.0_factory_reset.pdfIn PDF document text
    • http://dusameferadulo.onlinewebshop.net/how_to_assemble_bright_starts_swing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81fcb642-3652-4178-8e17-43fee1c009f2/nilutabovokafosikepob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8671b399-f3f9-4a8f-a6ad-2740ff77630f/last_of_the_mohicans_book_characters.pdfIn PDF document text
    • http://wigunegulawiko.rf.gd/borniak_uw-_70_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe43c2c1-245d-45a1-afba-17a290c8c0dc/aspiracion_de_secreciones_tecnica_abierta_en_pediatria.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 4572 bytes
SHA-256: fc94aa1d40eb03d4bf2802a4005e66f2282cbbdae6627979cd5727da0334fb3c
font_01_sfnt_off0000fa4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4B 10472 bytes
SHA-256: 24d9f8a9a5fbb0938f7f6c4dc906edbc64d4c68a223e082ade976e9fab637f69

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