Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8f8430c8441100…

MALICIOUS

PDF

65.6 KB Created: 2021-02-13 11:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3cc139331aa7754e630e3e6e48a4685d SHA-1: c098de760bd4a4e12939fdc6bef288135974ede7 SHA-256: 7d8f8430c84411001f4cd387f37b5c2fca3edf548b967cf2e1f6ceb79edf72a4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially malicious websites, likely for phishing or ad fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/aws?utm_term=consumer+reports+cell+phone+service+ratings PDF link annotation
    • https://vovinusowoxojik.weebly.com/uploads/1/3/4/3/134349833/bepixiwokub_waseketefopurip_lifewovo.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/XgfjdZX/tiktok_app_store_ban.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/bggCAgc/billboard_pic_frames_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/nhcGQxv/90781353511.pdfIn PDF document text
    • https://cdn.sqhk.co/sovixojer/mjaDEje/all_about_history_book_of_ancient_egypt.pdfIn PDF document text
    • http://kepibarufot.22web.org/benny_s_dispatch_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/wediximewoza/SFjncia/fake_call_prank_lite_girlfriend.pdfIn PDF document text
    • https://cdn.sqhk.co/vovusupa/cjbgdJR/jukanazemufezesulidawiw.pdfIn PDF document text
    • https://xipasole.weebly.com/uploads/1/3/4/8/134853136/mujezam_bukovinimigeve.pdfIn PDF document text
    • https://suzagosezamonu.weebly.com/uploads/1/3/4/4/134446802/b29ff6ef.pdfIn PDF document text
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/radafew.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/ojbjgjj/54340487571.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://jonufinufezo.epizy.com/bseb_tet_admit_card_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/mhw_greatsword_tackle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/brawl_stars_private_server_free.pdfIn PDF document text
    • http://magajavopisili.epizy.com/corporate_invoice_template_docx.pdfIn PDF document text
    • http://rowesatuminef.rf.gd/9929645825.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/44681766844.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/94300887582.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/33391040842.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB809 5312 bytes
SHA-256: ded36bfda3d816744198e11dd323f375a83768b6ca4b409cfa7940d93cc16254
font_01_sfnt_off0000c9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EE 9532 bytes
SHA-256: f3e24f4927fd450ecd994e03a6791ec1760b793d6fe7b4f749446c7b0abab8fc
font_02_sfnt_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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