Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0686545c83ba40…

MALICIOUS

PDF

76.7 KB Created: 2021-04-05 06:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1f69208ffba9f2f3e4e9510d8aa27295 SHA-1: dff84c33ae87f4567efb6a9ee443151749acce3a SHA-256: 2a0686545c83ba40376ab7a0601d7692897c2d5dbcd190b79102c30c3155463b
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting, likely intended to trick users into clicking a deceptive download link. The presence of embedded URLs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/123?utm_term=project+monitoring+and+evaluation+report+template PDF link annotation
    • https://wixumiwob.weebly.com/uploads/1/3/0/7/130776296/xosogegatuna.pdfIn PDF document text
    • http://sportplays.ru/do_stauer_watches_have_batteries1bdfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5fc9d6d4b648c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_6050df2e588c5.pdfIn PDF document text
    • https://xetizokabonon.weebly.com/uploads/1/3/2/6/132696323/siwolipuk_sesikuk.pdfIn PDF document text
    • http://zelopaqq.xyz/attack_on_titan_season_4_episode_3_explanationtcq0m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387704/normal_5ff3d3c6a8ed0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_604799324def7.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_ba3476734f7a48c6be7dc4510cff6037.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/talokurekapiwabewesogekel.pdfIn PDF document text
    • https://13cfbe10-32e4-4d7a-9072-8dbd3280e6b8.filesusr.com/ugd/994e9e_ae6c9f2479764b17b016e1bbaf214229.pdf?index=trueIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_f0b65c404def4333b818e4498ba243e4.pdf?index=trueIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_80e45294e52b4c4090e8b7295e5698ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/waxorexoz.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/clasificacion_de_los_titulos_de_credito_segun_la_ley.pdfIn PDF document text
    • https://651f5d5e-5f42-4fb0-8380-889764ca350f.filesusr.com/ugd/b2f7c1_a7dc4efa291f42f4a65b1c4c2214acb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/50645844563.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/gizanigapejobirafix.pdfIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_39d1450a7b5b47698317d9ccb28d2e4a.pdf?index=trueIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_8fc15ba86e8c45deabb25386c4f3b31d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC49 5352 bytes
SHA-256: 1f9465996dc8b2d2f03cbe142580993d8a540dd17ca02e3e7b95cc9c385e5300
font_01_sfnt_off0000fe6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 10852 bytes
SHA-256: 3dc25d872ec0e978e2e4adbc8f882164ca42d30aa5c053d2656a971070141a00