Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0905e48b5c9951…

MALICIOUS

PDF

75.9 KB Created: 2021-06-12 22:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: adc94f282a8be86e8ca33ed5d31e1375 SHA-1: a7dccf89182683a5d1708d3241bdfcdd75f6e9a4 SHA-256: 1a0905e48b5c99517728e87639654b526fa58de1313377ae870be7cb85c69201
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or SEO spamming operation. One prominent URL, 'https://queure.ru/pbw?utm_term=hotel+rwanda+full+movie+watch+online', suggests a lure to a potentially malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • 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=hotel+rwanda+full+movie+watch+online PDF link annotation
    • https://xasewaverafi.weebly.com/uploads/1/3/4/8/134868265/fajirusapanezem_fipogomobarewaw_puzuxak_wofepobipere.pdfIn PDF document text
    • https://bupiwiwokegiju.weebly.com/uploads/1/3/4/5/134598777/06a67a2ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413835/normal_6000348c9d8fd.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/6092400.pdfIn PDF document text
    • https://damenuxorofupob.weebly.com/uploads/1/3/4/7/134711178/7481342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470540/normal_604a49fd6dffb.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/5f34ba412.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/cede8715-0374-452a-8c53-5dc379d7a858/master_machine_learning_algorithms_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b959e154-a1ce-4fcb-bdcc-a5b5fdfd3cf9/how_to_get_rid_cellulitis.pdfIn PDF document text
    • http://tulezibat.pbworks.com/w/file/fetch/144855795/75231668301.pdfIn PDF document text
    • http://mumubib.pbworks.com/w/file/fetch/144687825/23865449010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8605ab8d-f6bd-4398-8246-38432fead9be/clasificacion_de_numeros_reales_y_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20086d7-aafd-40ab-ba6c-3b017a46f356/gutukosexazabifag.pdfIn PDF document text
    • http://jojekepodef.pbworks.com/w/file/fetch/144633642/lean_six_sigma_black_belt_salary_us.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4fb5ed-7050-48c1-b6a6-e273220ac6eb/qu_es_una_metafora_y_ejemplos_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c4bb0b-10dc-49cc-accb-b968d72de0bd/what_is_a_service_retailer.pdfIn PDF document text
    • http://sirazumebow.pbworks.com/w/file/fetch/144544035/mafevozojudodim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b162fbd-a49c-48b0-836f-03161860eabf/xuxalasudedulipomuvakut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd714eb-ca61-4659-83fb-0ea4b9bf7554/pesixik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a7784bb-c9de-44ab-91df-b27c1ab06b88/is_a_3.0_mercruiser_a_good_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd684566-a4b8-4327-a0c6-22804fa7bb0c/htc_one_m8_battery_review.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/f/narug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78fac3ff-3e78-4d58-aa22-22c6d2ce9950/creating_two_way_frequency_tables_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26837e63-86a6-491e-8be7-a73880f15855/smart_bp_hr_bracelet_user_manual_portugus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acab1cc7-58e9-4d96-9564-5be4bd133282/how_to_clean_bissell_proheat_2x_revolution_carpet_cleaner.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_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 5196 bytes
SHA-256: 2b69d45ec7fa4757046cd4808be25e613f5a7b017a1e8db0cdd9441dd7299eea
font_01_sfnt_off0000fc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5E 11348 bytes
SHA-256: 8972224ae34783b0c90298e4c5adc3bf27d4c6844e00dda0a2a852cb1ce9d759

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