Malicious PDF — malware analysis report

Static analysis result for SHA-256 9050a9f61b5b5078…

MALICIOUS

PDF

72.4 KB Created: 2021-03-26 08:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 57d2625a382c8ad2aefd7fce9bc0bfc6 SHA-1: 61d51ed70cbd786ff68c8949e51c3d82151ff2c7 SHA-256: 9050a9f61b5b5078bd970f5d3b8288a0952aa985a2c5c8bc492977fe5e67c3e1
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, directing users to numerous disposable domains, with one URL specifically mentioning 'award' and 'guidelines'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs and link farm behavior suggest an intent to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jumiwimov.ru/award?keyword=idsa+clabsi+guidelines+pdf PDF link annotation
    • http://sanamikegimelab.22web.org/tokyo_ghoul_manga_volume_12.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/basic_core_strengthening_exercises.pdfIn PDF document text
    • http://mazezoda.22web.org/veritas_prep_complete_gmat_course_set_-_12_books.pdfIn PDF document text
    • http://parovosi.mygamesonline.org/hoover_steam_cleaner_replacement_pads.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/dowaxavu.pdfIn PDF document text
    • http://tarigutese.mygamesonline.org/arecanut_tree_climber.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/8805070451.pdfIn PDF document text
    • http://mibikazut.mypressonline.com/9091300044.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/alimentos_con_carbohidratos_complejos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kujujigufa.epizy.com/13209834855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6991687-dffc-4958-ad5b-d4798332f6a6/ps_vita_price_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e607aad7-eaa5-4172-a94f-8a1cb3a85e9d/suwuwijulatuvozavevuweka.pdfIn PDF document text
    • http://wefugugis.epizy.com/anthony_dasan_new_songs_masstamilan.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/digital_electronics_previous_year_gate_questions.pdfIn PDF document text
    • http://gadoxijumulop.epizy.com/24769144364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a9f7f4-1079-400c-82d7-e7b920078e1a/sinners_in_the_hands_of_an_angry_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05efa3a0-77b8-4e4d-b88a-421749e0430d/juegos_para_hombres_y_mujeres_baby_shower.pdfIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_b9f2198deeeb4a86b04a80fe75c6ce6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7205b7-5b55-4cab-8e30-cabec08724cc/82256870478.pdfIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_c2a0f3da39304421b71a34de130d3ca2.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_off0000de22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE22 5304 bytes
SHA-256: fe14062ad118708b10b9bdecaa48c028eda446c20bbe9a89d3ec06f6cf915963
font_01_sfnt_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 10648 bytes
SHA-256: b4aec83d788ddd3275d11f17fc8d6a7393b35259559dc07822e87c11b5561303

Open this report in the interactive analyzer, or submit your own file for analysis.