Malicious PDF — malware analysis report

Static analysis result for SHA-256 843209aaa1671db3…

MALICIOUS

PDF

87.7 KB Created: 2021-03-22 19:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8e0e2bb3af8e1e20c12f1eec212aac72 SHA-1: 258bdf31875af9b08f04cc97523ad63c4318383f SHA-256: 843209aaa1671db36460808d0114e8ba7d8d2911ca34b07b6f113270c3049d9b
186 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to various external websites, masquerading as relevant information. Heuristics indicate a high likelihood of malicious intent, with ClamAV specifically identifying it as a 'Pdf.Phishing.Trojan'. The embedded URLs, such as 'https://bologen.ru/award?keyword=ahmednagar+fort+information+in+marathi+pdf', are likely part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://bologen.ru/award?keyword=ahmednagar+fort+information+in+marathi+pdf PDF link annotation
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/labajirukirun-banek-kugibozutadoli-relovitekev.pdfIn PDF document text
    • https://tikigafose.weebly.com/uploads/1/3/0/8/130874564/muvuzizizuk.pdfIn PDF document text
    • https://gapidegit.weebly.com/uploads/1/3/1/3/131379699/5585750.pdfIn PDF document text
    • https://nuzazetoxulo.weebly.com/uploads/1/3/1/6/131636602/e1ce35ce3c21d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460071/normal_6010a114ddc25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465398/normal_5fe98e02d7551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478430/normal_60493b9f6c778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496374/normal_603fffb28bf1f.pdfIn PDF document text
    • https://vilofezilo.weebly.com/uploads/1/3/0/7/130740065/lusotunadukuwitumil.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/c6cfb6fd-2f3a-4acc-abb4-1ddde904ab97/how_to_set_the_time_on_a_citizen_eco_drive_e820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0988ac8a-a255-4de5-a616-58a8a39a35ee/59764225921.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_ce4e07f6bb7c476197868ad81a20d7ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/concatenate_in_crystal_reports.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_b47973de35fe4ae484913a9d751175da.pdf?index=trueIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_b11ea7638aab46b5a8968583c01a8b2b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/43410645077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d6178de-c8ab-418c-a2cc-09034a21fdfc/keurig_k145_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/what_does_code_p2098_mean.pdfIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_421b3ea9b0794a63a342a03e6928196b.pdf?index=trueIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_7b8fff82592b43ccb74998370e77575e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a323660-7d1c-4690-acfe-ca4865786489/lightning_thief_series_books.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/masked_singer_season_2_episode_3_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/slewing_bearing_skf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e322e7c-c240-44ad-8201-90b85bf669a5/joe_and_charlie_step_6_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cd761a-64a0-4348-8363-3cfa04f940e3/fepuxerubibunekujedire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b353b15-de8b-4b65-9b82-2c75f8c25c25/las_medias_del_flamenco_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10b4f72b-f2bb-4966-8171-05a28bbaf5a6/xevatalose.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5A 5024 bytes
SHA-256: a10edd63445056c9dcfdb300d4e774a83479082dbfc45c6d4da0fd1d3e789d73
font_01_sfnt_off00011e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3D 10712 bytes
SHA-256: a734876fcc496f70996806e65577b31ab3243ee9ebbf63156ef805af8608b5a6
font_02_sfnt_off0001429d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1429D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71