Malicious PDF — malware analysis report

Static analysis result for SHA-256 239b354fe32e9496…

MALICIOUS

PDF

77.7 KB Created: 2021-05-13 17:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0f76b75de3820c9d122ce55d79c4b5e0 SHA-1: 276b25df62fafd5f67bdc9b19b86216661aa0c15 SHA-256: 239b354fe32e949660c7cac659214cd397ee18d26f8014c14c7da027b5120f55
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with at least one, 'https://baarspo.ru/strik?utm_term=hewlett-packard+hp+compaq+8000+elite+sff+pc+specs', identified as a potential phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting malicious intent. The ML classifier and ClamAV detection strongly indicate this PDF is malicious, likely serving as a phishing document or a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://baarspo.ru/strik?utm_term=hewlett-packard+hp+compaq+8000+elite+sff+pc+specs PDF link annotation
    • http://dsv-trening.ru/sowamawodalofaturuziwesu7184l.pdfIn PDF document text
    • http://meetplafond.xyz/molog41zey.pdfIn PDF document text
    • http://reactivascotia2020.com/can_you_use_playstation_3_remote_on_ps48dsc2.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/south_african_traditional_food_recipes.pdfIn PDF document text
    • http://zutobemomej.22web.org/sutifotun.pdfIn PDF document text
    • http://natur-bio.space/why_won_my_microsoft_bluetooth_mouse_connectjimfu.pdfIn PDF document text
    • http://tb-films.ru/kezoxafefafelarexutili72r45.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/what_can_i_make_with_an_air_fryer.pdfIn PDF document text
    • http://buybritishcat.com/957147867389v2s6.pdfIn PDF document text
    • http://newser.site/sefezukozddu7.pdfIn PDF document text
    • http://madewithsunshine.com/english_to_bengali_translation_dictionary_download8ng0l.pdfIn PDF document text
    • http://vertigoa.online/nadelawuvitirizenowotusefpryaa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzawasilugije.epizy.com/oxford_phonics_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0103b7e4-5c2a-4596-b237-b44a48af6958/beloved_audiobook_free_download_sites.pdfIn PDF document text
    • http://xuvewuzedetafo.epizy.com/economic_zoology_books_free_download.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_5fc46bf71a684d00a45df501a0285b9c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b08d35-a199-4f43-9e78-d71c88bc3236/science_vocabulary_words_grade_9.pdfIn PDF document text
    • http://mapureju.epizy.com/metformin_overdose_lactic_acidosis.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_fda00e7931454d668fc8572f4f4d18de.pdf?index=trueIn PDF document text
    • http://vibesiwag.epizy.com/how_to_start_writing_project_report.pdfIn PDF document text
    • https://313cea95-bd78-4864-9d9d-3b26c3bbe0bd.filesusr.com/ugd/2142af_198d94e1ec0c4a619ea030c6908bd89d.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_ddcf74ef8da14cfd9734f4e776c39513.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc809a6-0724-421d-9bac-cafaba271534/real_estate_finance_and_investments_14th_edition_solutions.pdfIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_78e0f1b897194f8f939c2604c8bd8acd.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_off0000e30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30C 6008 bytes
SHA-256: 2b078241c01c8cd6a1b8556b7a261bc30064a02b3b43668a0a2c22fcc8c6c002
font_01_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 15464 bytes
SHA-256: 5a3939b1f9505a3723bda1fa428da72795747e068a24da9a095c3f7958f22f92