Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de0fd822b2a444a…

MALICIOUS

PDF

112.7 KB Created: 2021-05-13 16:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d44eb89afcf287d160751b790876e1e9 SHA-1: aa7103cf61920047d4103d6a61f11dd91b83945b SHA-256: 5de0fd822b2a444a5eada27fafc7837e4aeb06ec00f70c44c85252c71804f377
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('baarspo.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, further supporting a malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=dell+poweredge+2950+ii PDF link annotation
    • http://jirazabewofi.22web.org/coc_cheat_engine_apk_free.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/44991767421.pdfIn PDF document text
    • http://x-bionic.shop/xitenumozatkhm93.pdfIn PDF document text
    • http://samozanyat.info/how_does_time_work_in_the_lake_house_movieig6s9.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/jabitudurakasuvil.pdfIn PDF document text
    • http://urott-hu.com/hide_worksheet_in_excel_2003jjg3v.pdfIn PDF document text
    • http://ratebekanolaja.22web.org/tujanulobafedobimok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xesujenomudot.epizy.com/90342180274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58e03e7f-5816-45fc-8408-fc209b4e75b3/68777103432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdbb0507-8d6b-4093-9a83-5b90162c6fb1/psychology_books_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6478a55a-525a-4120-9725-d01bfc648cb6/samsung_tv_service_menu_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/bewesevugazozef.pdfIn PDF document text
    • http://xatopuwapapifo.epizy.com/fonijabinemomol.pdfIn PDF document text
    • http://lekeviwa.onlinewebshop.net/cours_affaires_rglementaires_pharmaceutiques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1dfb3a-d949-4af2-ab8d-ee1c0a7904fb/3307134964.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/new_rpg_android_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/printable_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7707d758-cc92-4651-b260-8ead61bb3999/shear_stress_in_a_turbulent_flow_is_given_by_the_formula.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000156b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156B7 4988 bytes
SHA-256: 80d09b4ea60c2fff3a35e63d9a9c8b2fdc452765888c51aa0979a2f19cb24972
font_01_sfnt_off000167d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167D9 12200 bytes
SHA-256: 789fd92fb8bb290b4c22f973ddbf90bb139fc627d616165971845a56f383e581
font_02_sfnt_off0001916a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1916A 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off0001a698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A698 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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