Malicious PDF — malware analysis report

Static analysis result for SHA-256 67722760b55dac10…

MALICIOUS

PDF

82.3 KB Created: 2021-03-04 04:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04cdf33ff78e03a7dbb61cb9b9a3bf12 SHA-1: aa8009e352e568d7c569a6c2a4ad62ce7570a687 SHA-256: 67722760b55dac10f662084049791affd54cdd24f1c37212d99483d2b29ee5dc
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, pointing to various domains. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.Trojan. The primary attack pattern involves redirecting users to a link farm, likely for SEO spam or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=q+significa+la+pelicula+el+hoyo PDF link annotation
    • http://study-english-05.site/ganaxexinuvuniurrcs.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/1qU7gvP/nexolovubekajodezetuxes.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/21RNieU/wopewinazariwav.pdfIn PDF document text
    • https://fikanofuzak.weebly.com/uploads/1/3/1/4/131438747/4842262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423772/normal_5fed481c2725a.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/fDFohh8/16155000685.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/R3YvGtP/pozodemevijexis.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/ghibNjf/sniper_elite_4_ps4_gameplay.pdfIn PDF document text
    • https://kigefewapese.weebly.com/uploads/1/3/4/5/134528385/zazovunerotolo.pdfIn PDF document text
    • http://goodsfor.life/stihl_ms_250_price_australiav50nc.pdfIn PDF document text
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/dedemunozinepa_xawure_besikagovale_pemedijokir.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/iaicoQl/amazing_deals_store.pdfIn PDF document text
    • http://importants.space/businessman_telugu_movie_in_movierulzgt5dk.pdfIn PDF document text
    • https://buzowupe.weebly.com/uploads/1/3/1/4/131483044/9295f4bc70b46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416316/normal_603d0fc871f8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450046/normal_5fcdf40e42e47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457318/normal_600ff65f66462.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/BFijegc/zezesixemoten.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/VgiLhez/capsule_wardrobe_2020_checklist_fall.pdfIn PDF document text
    • http://slamelina.website/meiosis_reading_comprehension_worksheet6rsno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413977/normal_6007a831a1fbd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 5344 bytes
SHA-256: 727ee8827a4f498826db6debe2eb281c806ef7bdb1615230179410857741dba0
font_01_sfnt_off00011572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11572 11712 bytes
SHA-256: 8122c9c040dbc7ff26add16ce4ae67db976f555024bf45c41bc01e0111859dcb

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