Malicious PDF — malware analysis report

Static analysis result for SHA-256 e201d390dfb04ac9…

MALICIOUS

PDF

74.9 KB Created: 2021-05-31 20:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f6ada1ac11e42c6b0b66f407cdf5a81a SHA-1: b385829d876c75592d48818483532eae5ec63a10 SHA-256: e201d390dfb04ac9ee568c19ad5fbcbb443d3df60e511bca3374abba69a5aa35
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which, 'https://queure.ru/pbw?utm_term=how+to+fix+nespresso+lattissima+milk+frother', is flagged as suspicious and likely leads to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

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 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://queure.ru/pbw?utm_term=how+to+fix+nespresso+lattissima+milk+frother PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366405/normal_5ffa855ca89f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479710/normal_601f7e800c0c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144411414/palabras_agudas_llanas_esdrujulas_ejemplos.pdfIn PDF document text
    • http://nagomax.pbworks.com/f/best_buy_san_antonio_forum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5366acad-dd23-48bd-b689-1297a4c882fa/powija.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/bodozaxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2541a9-9c76-4f8a-91e5-c5bbb36a4b0a/wofimetu.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/how_to_find_the_median_of_grouped_data.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144415314/6320488248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d32354-2556-4791-9bce-ff56d18651cb/is_an_ear_thermometer_more_accurate_than_a_forehead_one.pdfIn PDF document text
    • http://kolelulu.pbworks.com/f/arunachalam_tamil_movie_download_tamilyogi.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144415671/age_of_empires_3_complete_collection_steam_cd_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0cd6aa-6839-4895-978d-a79b76783027/is_25_the_right_age_to_have_a_baby.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/bejozukurafagubatudukufa.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144413313/pokemon_go_spoofer_apk_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9623e609-902b-431c-84dd-666478f7478d/jusunujurunafatokedanik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5006970f-ffab-4165-92b8-f6d2a6717d3f/fedex_poster_printing_promo_code.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/bepozajogudiwuzina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d1403bf-50f6-49e5-bb6c-ae8d52853f16/90912576767.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144422277/mulofuvomimibonobiwasawaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a12cf06d-f7f7-4912-9380-b3f357508d3a/compare_amorphous_and_crystalline_solids.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_off0000e877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE877 5324 bytes
SHA-256: fcb9a47167adacb5caea6ca8224f25821ae3b161de32f6dca86ee67a4a1acc49
font_01_sfnt_off0000fa7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7A 10508 bytes
SHA-256: 7ed22ea8ada2aeb7a2733b42122e4c1a9410096d177947455dee6c38d8df7568