Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fcc4f74418776d7…

MALICIOUS

PDF

74.1 KB Created: 2021-06-09 20:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 095731e0c5466390464390c9c71b6b20 SHA-1: 09f2cf2bd10a2edb6888129416e561d4d7c09d71 SHA-256: 7fcc4f74418776d7864a9c97b10824bfd8d05462fbe4cb6bb3a99c452109f4c2
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to deliver second-stage payloads.

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://crysiq.ru/pbw?utm_term=the+weeknd+my+dear+melancholy+zip+download PDF link annotation
    • https://zubowosusotikip.weebly.com/uploads/1/3/1/6/131637009/rajodalus_lefamibusowajuv.pdfIn PDF document text
    • https://lesamasipedu.weebly.com/uploads/1/3/0/7/130739144/1175009.pdfIn PDF document text
    • https://morozosewiveloz.weebly.com/uploads/1/3/4/3/134387595/9be52d29ae1c.pdfIn PDF document text
    • https://fovejurifeke.weebly.com/uploads/1/3/4/3/134342496/lunul_toniz_kisedip_razila.pdfIn PDF document text
    • https://tovigaxibikufa.weebly.com/uploads/1/3/4/8/134875165/gezakenoporelamina.pdfIn PDF document text
    • https://kadexatazi.weebly.com/uploads/1/3/4/6/134648676/baserejeza.pdfIn PDF document text
    • https://seruliwosudaz.weebly.com/uploads/1/3/4/4/134457931/9721612.pdfIn PDF document text
    • https://gojenejanoz.weebly.com/uploads/1/3/0/7/130739654/kejim.pdfIn PDF document text
    • https://nateguwab.weebly.com/uploads/1/3/1/4/131453796/939a0347b2b.pdfIn PDF document text
    • https://bavifevip.weebly.com/uploads/1/3/6/0/136049805/3743637.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/4d6866bd92f74db.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/sanawixeget_dosidezujiki_vizasisobak.pdfIn PDF document text
    • https://rajofike.weebly.com/uploads/1/3/4/5/134500595/4972851.pdfIn PDF document text
    • https://rupuleda.weebly.com/uploads/1/3/6/0/136002844/8594053.pdfIn PDF document text
    • https://raxokasovupix.weebly.com/uploads/1/3/5/3/135389905/sivenakojarabo.pdfIn PDF document text
    • https://rijivujebevobog.weebly.com/uploads/1/3/4/4/134488471/tivoj.pdfIn PDF document text
    • https://rizadubarezesul.weebly.com/uploads/1/3/4/4/134499036/8853140.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesotarizim.pbworks.com/w/file/fetch/144825423/cartoon_me_app_free_download.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144521523/what_page_is_the_green_light_on_in_the_great_gatsby.pdfIn PDF document text
    • http://kemuxin.pbworks.com/f/multiplying_decimals_worksheets_5th_grade_common_core.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/what_size_should_i_start_stretching_my_ears.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/f/ruvuvek.pdfIn PDF document text
    • http://davusavesasi.pbworks.com/w/file/fetch/144793749/how_to_get_e_ticket_for_air_india.pdfIn PDF document text
    • http://fiwonotexo.pbworks.com/w/file/fetch/144679584/42911290443.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_off0000dfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD2 5392 bytes
SHA-256: f8f8891b6cd879e0fd0b5649d1e3eb6d11452256dcfe7d4b96287f81dc200716
font_01_sfnt_off0000f21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21B 13052 bytes
SHA-256: c5ace2bdd178c94db10deb286152fe35b62293074d62f3faa76ac61d451e96b9