Malicious PDF — malware analysis report

Static analysis result for SHA-256 7118458cc6a1833e…

MALICIOUS

PDF

105.4 KB Created: 2021-06-13 08:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4fd1b44dd1f6045b0289547087129aaa SHA-1: e9941c53524151f9b5c9a4966bc2c6e26693dcd6 SHA-256: 7118458cc6a1833e0e4f110cd9125753897385b16a1c21abea049d702532e318
186 Risk Score

Malware Insights

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

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 0.9994

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://pixomot.ru/pbw?utm_term=legend+of+the+blue+sea+season+2+episode+1 PDF link annotation
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/bodovat_busupupigerirew.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/wowis.pdfIn PDF document text
    • https://kutusavirub.weebly.com/uploads/1/3/4/2/134265758/5450263.pdfIn PDF document text
    • https://kogemopisita.weebly.com/uploads/1/3/0/7/130776015/sogetazo.pdfIn PDF document text
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/8377570.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/teriwetisokoxifubet.pdfIn PDF document text
    • https://jodonorinomudo.weebly.com/uploads/1/3/4/3/134316483/3806595.pdfIn PDF document text
    • https://dogixosewe.weebly.com/uploads/1/3/4/6/134633635/c30fb022a3380ab.pdfIn PDF document text
    • https://vemisalisak.weebly.com/uploads/1/3/1/4/131437925/waxur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5fe6320c7903b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366048/normal_5fcbc1470b936.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/2047645.pdfIn PDF document text
    • https://terowibew.weebly.com/uploads/1/3/4/3/134370771/1ff0b01855.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/820502eb-6577-4316-8f44-6b5100ab19af/paper_towns_book_page_count.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321c3b19-6b74-42bf-b2f0-71754c422b7a/dettol_disinfectant_spray_safety_data_sheet_uk.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144450420/zisodumogorirezazebuda.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/counter_strike_1.6_aimbot_download.pdfIn PDF document text
    • http://supulilofib.pbworks.com/w/file/fetch/144740739/fuxaritibade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1decea4f-8910-4280-a1c5-dbde9aefb705/dd_vampire_class.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83cd7304-a15d-4fcc-990a-f01245d1cfd4/what_is_construction_in_interpretation_of_statutes.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BD 5540 bytes
SHA-256: 86264d89b129848d0fb7cfbeac687dcbe1ff66f9444e4e80ff7f592e4b11aa31
font_01_sfnt_off00014d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D42 5472 bytes
SHA-256: 7d5c807d14cba4571ac7b85d3d3d8b1aea99ba5ba3f2339dbbc116c44e6e20e7
font_02_sfnt_off00015fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FDF 5812 bytes
SHA-256: acd9abe36e4ddf506b3cdda254529c3e82fde0706dea23a2d4078e32bd76a8fc
font_03_sfnt_off00016e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E78 12736 bytes
SHA-256: a06663914a3b85f7fd79a1ce920080d9b9cff2632ce8ad5959d738ff3e777663