Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8cd34f00248cb6a…

MALICIOUS

PDF

83.0 KB Created: 2021-03-14 23:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a4e42b077a46b3f167a4f2bd08732e4e SHA-1: dc60268bce450e70159141fae37e15813d84429d SHA-256: f8cd34f00248cb6aca4feb774984ad108ce665bb0997db82925a3b1fcadd668d
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains or suspicious-looking paths. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and the 'link farm' heuristic suggest the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware delivery.

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://xajibur.ru/award?keyword=capitales+des+pays+du+monde+pdf PDF link annotation
    • http://tivuximuliku.mygamesonline.org/automation_anywhere_control_room_user_manual.pdfIn PDF document text
    • http://help-nanny.site/complete_ionic_and_net_ionic_equations_worksheetf1hbj.pdfIn PDF document text
    • https://cdn.sqhk.co/murofoli/4V0mJ7c/weler.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/qgidnia/kali_linux_google_drive_link.pdfIn PDF document text
    • http://blue-tick-central.com/mulifajevuxosegewagaysur4.pdfIn PDF document text
    • http://uptodate.site/think_of_me_phantom_of_the_opera_chords11nzv.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/jehcqjj/summitsoft_phototools_2_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/81747870671.pdfIn PDF document text
    • http://vegubom.atwebpages.com/auriculoterapia_francesa.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/royal_giant_deck_guide.pdfIn PDF document text
    • http://zewogukanonudut.epizy.com/vodavi_starplus_sts.pdfIn PDF document text
    • http://zifezerolivuba.epizy.com/70142322047.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/bolne_wali_cat_ka_game.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_55c2ded29dfa453babd34cf24b371c5f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/quadax_julian_date_calendar_2021.pdfIn PDF document text
    • http://sozofini.epizy.com/89978144502.pdfIn PDF document text
    • http://zafotuzovis.epizy.com/68712564883.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/57658793943.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_9327f0933ac542469a7d0226404e327e.pdf?index=trueIn PDF document text
    • http://wazilopuwifelig.epizy.com/garmin_gpsmap_64s_manual_espaol.pdfIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_eb445ac952ee4abca0f90c57fbf69c9b.pdf?index=trueIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_4ffc86ef5d9a4c568d97f191d4872f35.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_off00010425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 5096 bytes
SHA-256: dfd7624b12a657979f82b50c2c1194a24d16187e3eb512529b96ae9993913608
font_01_sfnt_off00011573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11573 13208 bytes
SHA-256: f4718d3b55ce8a736d6d37340b65e6b8430a016bb30cbe30b62573b319712084

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