Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d0dee4e2b9bca2…

MALICIOUS

PDF

71.2 KB Created: 2021-05-01 20:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 541d03aed6d5ab7eafb1d04dc1bcf9d7 SHA-1: 05d21eec876b461aad23b392979151c33e56717c SHA-256: a0d0dee4e2b9bca282b286632d8074fbb239bdcb68c3bf97b678f4f844016959
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The primary malicious URL, https://midufefew.ru/strik, is presented as a search result for a seemingly innocuous query. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8618

Heuristics 5

  • 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
  • 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=how+many+pages+are+in+the+sixth+harry+potter+book PDF link annotation
    • http://maxirem.mygamesonline.org/chuyn_file_sang_file_nh_trc_tuyn.pdfIn PDF document text
    • https://vijidosuxidisad.weebly.com/uploads/1/3/4/3/134326963/rigulego_fasetojil.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/84230160173.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/bggJEXX/44718872159.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/hdjfeKJ/puniziraxuvimuvupo.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/carcinoma_de_celulas_grandes_pulmon.pdfIn PDF document text
    • https://fuzurisef.weebly.com/uploads/1/3/4/3/134369427/2138882.pdfIn PDF document text
    • https://kolajinetam.weebly.com/uploads/1/3/4/5/134584148/2811970.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/fb5bc39c-965c-4e29-b045-673bbb8f2c04/rifonumeku.pdfIn PDF document text
    • http://punotonaduwize.atwebpages.com/3._bundesliga_spielplan_18_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a571e10-89a1-4405-9cbf-19e713fd0efb/nulofumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b21fd41-fb1d-42dd-aa5f-9541239e8d12/97736889633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83acb830-7daa-4cf9-b9ea-47355872a0b7/xenegepogivivolarez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bcd16ae-89ea-4af0-8a59-d15433cebce0/nidubikebofowew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85284b95-0a41-4273-80ee-7530d6469aed/diary_of_a_wimpy_kid_the_meltdown_archive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53544709-46d8-4438-ae96-214ed1acdfaa/the_book_thief_full_movie_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38756fac-b635-4ffc-8a60-0d73d8333d8c/integration_of_x2_cosx_dx.pdfIn PDF document text
    • http://benamow.myartsonline.com/pathogenesis_of_peptic_ulcer_disease.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/north_ayrshire_school_holidays_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1788b894-87be-4420-bb60-e2771350dfc0/simodovegiviluserul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c60836-02d5-4764-88b0-2385ff3d362d/68424487761.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1C 5416 bytes
SHA-256: 9927532d2ff2aae86bfe5e7e884a5e04fd86f64a558860330939ac9e79d5876f

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