Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47f4737db3697e6…

MALICIOUS

PDF

78.2 KB Created: 2021-03-08 16:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 08a22984384af280a78d16813b333393 SHA-1: 9efaceaf9338a94e33339a0d7aeba5ad17b387f1 SHA-256: f47f4737db3697e63a458ef71d0f8671638c2cf9450d8763fe51064ad18ca530
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely a spearphishing attachment designed to redirect users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/award?keyword=exterior+angles+of+a+polygon+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/tutabudoxuwa/iG3geFM/18397125160.pdfIn PDF document text
    • http://canonsburglake.org/80913545997e4t8o.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/angfthj/49848204020.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/99570702862mqeoe.pdfIn PDF document text
    • http://frut-tree.site/kali_linux_android_tools_installhelqi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490364/normal_601e116239f6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_5fe6734b0b70e.pdfIn PDF document text
    • https://vuverararusug.weebly.com/uploads/1/3/4/8/134883490/1959054.pdfIn PDF document text
    • https://nifevokore.weebly.com/uploads/1/3/1/4/131437532/wozixoturedek-piluwewonukebul-jitobusukeruw-sigafeloremibab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_602eef510e1c9.pdfIn PDF document text
    • http://stnold.com/a_court_of_thorns_and_roses_series_book_11rem8.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/73kqlhf/numbers_1-_10_worksheets_to_print.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/puvajerisir_dowadamiga_bopewu_zixekup.pdfIn PDF document text
    • https://kesizibewasi.weebly.com/uploads/1/3/0/8/130813921/jofarekurelise-lidekefegovef-namemedexekad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5fca7f6f16b37.pdfIn PDF document text
    • http://o-karte-kopilka.com/tree_of_life_pendant_necklace_silver0pvwg.pdfIn PDF document text
    • https://sudarixadozitot.weebly.com/uploads/1/3/5/3/135331315/4d5ded07d414720.pdfIn PDF document text
    • http://laitlabs.pro/dotalijufewojurkb3hp.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/geVsjfs/74392680586.pdfIn PDF document text
    • http://ek-arenda.ru/wejaxegezuvp8566.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
    • 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_off0000e600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 5372 bytes
SHA-256: e2ee028e4a3bd575be72234f63ee084e9877f8262be66194f0389ee8ee740850
font_01_sfnt_off0000f85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85B 10716 bytes
SHA-256: cd2f654c075d7deb5c579daced2839668cde78a766799eab778a7e1ccb05e395
font_02_sfnt_off00011cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.