Malicious PDF — malware analysis report

Static analysis result for SHA-256 e304029d9e031ded…

MALICIOUS

PDF

76.2 KB Created: 2021-03-05 16:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 8bbef22d800745c4d1b4ced0b1f97395 SHA-1: 57ce0594d57246c934d80978335121ccf30be3a6 SHA-256: e304029d9e031ded3a9f86086012c47d697ad286b3392d6012e5883a5b0d0a5d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=how+to+code+data+in+quantitative+research'. This URL is likely used to redirect the user to a phishing or malware download site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=how+to+code+data+in+quantitative+research In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_602689c5d90e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457604/normal_5ff8932eedd91.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/australian_native_wild_dogs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472774/normal_5fcee96c87542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_603c0873c0c50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476148/normal_6029df1213dc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421461/normal_5fc91dd9b1f03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454982/normal_6006741f1202f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livirava.atwebpages.com/play_a_game_of_chicken_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e56853-bd6d-4fb4-ab21-fdc7a63f8cd9/84106123705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16b829a-6e9d-4ff0-a9f6-f0a69cbf6329/personajes_de_la_obra_la_ciudad_y_los_perros_de_mario_vargas_llosa.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/gozotapimuwijavumofoje.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/verajujilitegosekole.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/lymphoma_contouring_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc340566-2c5c-4db5-b329-7d84b8d3d4a7/jitilurumumazajef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81dc27e-681b-4832-96dc-e7556d5f7ae7/digitech_trio_plus_looper_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b2ca5b9-11ae-4cc9-a498-31ed55da94b3/how_to_score_perinatal_anxiety_screening_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b1abb5-28b9-4de7-88fd-0d8ce956ceef/kefomubanafiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582da3d9-649e-4d09-947c-b2272061e838/suvijufipumeno.pdfIn PDF document text
    • http://bopiguxa.atwebpages.com/xodufovafuwopazaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5676838-9249-4666-ba70-e3d4f4f8d879/liwuxiranekedovafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c04235-76a3-49c8-9ba7-ce99e844aeec/how_to_draw_a_dog_easy_realistic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e808a89e-3ece-4b48-87b8-d6892588ed99/a_peoples_history_of_the_world_chris_harman.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_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 5232 bytes
SHA-256: b404cffacd7c289abe3bb75b039c94294659a15b1c443e126abbe2d0b1f08259
font_01_sfnt_off0000ff7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7B 10540 bytes
SHA-256: 3b3836de235e923baddaefc702b84a9d3f511e8e10c174999dc346bfbd99ee10

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