Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28a818b523e283a…

MALICIOUS

PDF

78.9 KB Created: 2021-03-15 01:38:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2b98e0885d0d0d0b711ea79eb836cfa8 SHA-1: 957924979e92914bfb3124f5c7341764d990f86c SHA-256: e28a818b523e283af201ce1397c72af7958c2d11f22a97bffecb8bd24dfd93b8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=still+i+rise+lesson+plan PDF link annotation
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/pagivemekux.pdfIn PDF document text
    • http://loxebosobudi.66ghz.com/35887170556.pdfIn PDF document text
    • http://sowivonowiso.iblogger.org/96510397253.pdfIn PDF document text
    • http://nurigoluda.mygamesonline.org/78253534104.pdfIn PDF document text
    • http://yourdesk.website/zesirumoxavemu7m78d.pdfIn PDF document text
    • https://dibufasefeduvit.weebly.com/uploads/1/3/5/9/135975636/7921522.pdfIn PDF document text
    • https://welokanuxutumo.weebly.com/uploads/1/3/4/0/134017703/a94f44ecb7187bc.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/66378787479.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/what_is_on_the_front_page_of_the_herald_sun_today.pdfIn PDF document text
    • https://wifitesoxu.weebly.com/uploads/1/3/4/6/134631177/967195.pdfIn PDF document text
    • https://fejurisikem.weebly.com/uploads/1/3/0/7/130740008/8590469.pdfIn PDF document text
    • https://xowonijateroz.weebly.com/uploads/1/3/1/3/131380337/fejemixedazuro_vafaz.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/tepiguzol.pdfIn PDF document text
    • http://kudonolenukiv.22web.org/mutatejovufilibebib.pdfIn PDF document text
    • http://lugogojeradipax.22web.org/signature_2000_elite_lawn_mower_battery.pdfIn PDF document text
    • http://liketsven.xyz/faganabi5wllg.pdfIn PDF document text
    • https://gaxatibixowoki.weebly.com/uploads/1/3/1/4/131452935/xuxefigemokajolununo.pdfIn PDF document text
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/4858929.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wamigorudazuz.epizy.com/zawubevisugipali.pdfIn PDF document text
    • http://runuwug.myartsonline.com/arena_software_tutorial.pdfIn PDF document text
    • http://banitazivi.epizy.com/9852739089.pdfIn PDF document text
    • http://poxizigifami.epizy.com/spotify_songs_mac.pdfIn PDF document text
    • http://kojekudaraj.rf.gd/how_to_use_kirby_sentria_2_shampooer.pdfIn PDF document text
    • http://webuvur.epizy.com/troy_bilt_2500_psi_pressure_washer_carburetor.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_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 4916 bytes
SHA-256: c090b573aadbc39cd4492735fca73956ad5b6845c50841a8e66410923cf001db
font_01_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 10888 bytes
SHA-256: 56b1fe848ccdc3784b15da510e783e52cabd909036e3b97e95a2a3815b21133f

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