Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e1602b4b5d1dbc…

MALICIOUS

PDF

83.5 KB Created: 2021-04-08 01:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1c912a93a047d11faa2286c3c11440e7 SHA-1: ed0e033f89cc416511592d58d3f4960a9f2288a0 SHA-256: d5e1602b4b5d1dbc0dbfbe64a9c89974e568a2c06108e3d78a9f1fa5e6ec9698
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for link farms used to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=drive+the+surprising+truth+about+what+motivates+us+daniel+h.+pink+1st+edition+riverhead+books+2009 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392651/normal_6056054d23129.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/1hgfRji/kunilinula.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/jiijicD/teaching_your_baby_math.pdfIn PDF document text
    • http://sasawavivar.mygamesonline.org/19132501780.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/dggL5k4/tuner_metronome_soundcorset.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478951/normal_602b83b43c5df.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/gdibWov/30952380929.pdfIn PDF document text
    • https://cdn.sqhk.co/duzimisese/gernl3p/can_you_get_live_local_channels_on_hulu.pdfIn PDF document text
    • http://mopewogubit.getenjoyment.net/pexofarog.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/jurnal_alkalinitas_air.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463298/normal_60219513ac0c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_604a5db4f1dba.pdfIn PDF document text
    • http://autobaff.xyz/is_parental_alienation_a_crime_in_texasl5cle.pdfIn PDF document text
    • http://zoneeuro.pro/6359110311m2tgb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7849733d-37e2-49ae-a7e4-38cfbd06b112/myers_briggs_work_compatibility_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d721657-def1-427d-be20-71462886780d/red_rising_book_4_characters.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/attestation_d_hbergement_en_anglais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9736b7-1166-4830-9172-489d626a839f/how_to_make_soft_crust_in_bread_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ead664-5340-4e95-badb-634df2d1a957/12738663850.pdfIn PDF document text
    • http://pujumek.myartsonline.com/fifty_shades_of_grey_netflix_usa.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_fe3ea8bbf7d34125951558b5bd83c7be.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_d227ff8331144d9b83db819141774d97.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66272981-5f1e-44a6-9831-35ac3c12e991/what_is_horizontal_force_in_physics.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB56 6244 bytes
SHA-256: f4bf046450f36599d3ec69332442f787eda307eff14db8d4a9728736b44da8ad
font_01_sfnt_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 11620 bytes
SHA-256: 769a6d194b6634d4c553b4d6b9510f650830e3a5a82143e6487f0871de8a53f0
font_02_sfnt_off000127eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EB 16064 bytes
SHA-256: 0b6d67ed6f7b9ca340f69bc1efbee2cf1faeb02ae856abbfc241c325d1d7b232