Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45e94886d1ebbee…

MALICIOUS

PDF

104.3 KB Created: 2021-04-16 23:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ce613b364b2aacd760d5211952bc53da SHA-1: 57f6ba1198a40bbac0fecafe6d753706ea1fb280 SHA-256: d45e94886d1ebbee1a1277fe1f8e29fd6641f63ff15273e4ac1d21cf49fa250b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://midufefew.ru/strik?utm_term=digital+marketing+course+fees+in+hyderabad PDF link annotation
    • https://puwisubefubozaj.weebly.com/uploads/1/3/4/5/134516422/bafixizape_wogerufig.pdfIn PDF document text
    • https://renezotutumiw.weebly.com/uploads/1/3/5/3/135343322/lujabujisod-munurokataw.pdfIn PDF document text
    • https://darurirajilubi.weebly.com/uploads/1/3/4/3/134318819/8991943.pdfIn PDF document text
    • https://gafonubizaragu.weebly.com/uploads/1/3/5/3/135346264/nugurowafava_fugirubote_momonozoxomipe.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/29490d6e-9e7c-49c5-bbd4-f49d96cfb4a7/keurig_k155_vs_k150.pdfIn PDF document text
    • https://f5071db7-799c-4807-8cfa-c66b012f33b1.filesusr.com/ugd/9a4546_00dbb2e691c348a1863cef55c513d8a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/gesuxefujogamurajuru.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/7462141302.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/what_is_the_best_bread_making_machine_to_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/how_to_know_if_breed_dog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca6dbdc-19a8-4569-8df9-3bfc65b44a7d/sorry_not_sorry_naya_rivera_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/gopadesilitopagizu.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/53925565817.pdfIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_bcb1218f0d934210a6994d344e6f1bc6.pdf?index=trueIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_0fd72eac7e8048c59dc80c2dfe8cc9d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/casio_calculator_watch_light.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/watson_analytics_101_test_answers.pdfIn PDF document text
    • https://18282f24-d4e3-4c19-b4d9-8e3fdaa82145.filesusr.com/ugd/df2b7b_011e9242fc0c451b8a8f36991364100a.pdf?index=trueIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_9d1d9bffe6dc4e8aa8bfa3b403c4504a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/wodoredukamivajut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b994de14-578c-447a-b84d-48a8c2b74921/plato_euthyphro_apology_crito.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB2 5740 bytes
SHA-256: 499a2584abb04f015da36a131dabe5d7f951e2f6e5d6659c11f9caba3abb01af
font_01_sfnt_off00016f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F22 10696 bytes
SHA-256: cf04c228390e34aeb1b5932d1edf6bf9f614c3a8ddaf8cf94471ded4858e060a

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