Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1030c101eca219b…

MALICIOUS

PDF

80.1 KB Created: 2021-04-20 07:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3c1701a05a5f4a4d61c652ce078d22de SHA-1: cfca413d4093cf12c9f27bef1cadac3a96b9dc91 SHA-256: c1030c101eca219b789ef98017f935ca5cc8a19d523311df543455891e61cd3c
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 0.9995

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://jacksth.ru/strik?utm_term=how+deep+can+i+dive+with+a+padi+open+water+certification PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454436/normal_5fd0a67605ed9.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/eRpP4mr/losiditebemekukafisik.pdfIn PDF document text
    • http://a-trvl.ru/92239046890ppx6a.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/5yuCifN/86679201743.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/kTjhkgh/retro_game_room_setup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446759/normal_6003cac9f1d04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367960/normal_5fca04c7122d3.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/cDpgfVu/99841938999.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jaifjgs/vegiwuletomufoxozovujoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497687/normal_6032327460872.pdfIn PDF document text
    • http://talkme-news.info/14620993167vq1q8.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/a5e45cf6-50ed-434d-8978-29b2ced7248a/dulumolazarugunolivagaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6445199-4d9f-4a24-bad1-578ce922652d/gunape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd420d80-f929-4fa9-8ec4-2723c04734e7/65219397265.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/19291341666.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/sopixetuponilipi.pdfIn PDF document text
    • https://f3e0ee59-b309-4736-aefa-1db4f942b0be.filesusr.com/ugd/e87662_8e6bceaba65142778312a5ae5308fd9e.pdf?index=trueIn PDF document text
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_7a5c77e6559d4edd892239354f9a41d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomudufe/mechanical_engineering_malayalam_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/blade_and_soul_patch_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c2c3a9-56ba-4c00-a5d5-fc9a38ae4c3a/car_camcorder_fhd_1080p_user_manual.pdfIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_5ddc752f90e14deb8f091db004c6e5f3.pdf?index=trueIn 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_off0000ecba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 4932 bytes
SHA-256: d25c325fe0616300a9dd4b26a0b69adc04faaaaca42e706f51895f838a9080f0
font_01_sfnt_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 10844 bytes
SHA-256: 3ec236f19aad25a3a5b5d53078b44246887e13d48f48f9dbd78f4eca2459560a
font_02_sfnt_off00012261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12261 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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