Malicious PDF — malware analysis report

Static analysis result for SHA-256 e990e068f5eda46a…

MALICIOUS

PDF

54.1 KB Created: 2020-10-04 04:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dfc1e855147e677e8e2c6ba92895417b SHA-1: b84491c3c45e466e6dc52e8e8e43df601194d9e3 SHA-256: e990e068f5eda46a0b222f5c2de81f8f3b02423d5a30b966eb5a8a7f19faf035
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=hidrogenosulfato+de+litio+formula+quimica In PDF document text
    • http://nuzikira.functionalwitchery.com/uploads/1/3/0/7/130775411/7599919.pdfIn PDF document text
    • http://gogewuza.franzkiekeben.com/uploads/1/3/0/7/130775389/luzemulexig.pdfIn PDF document text
    • http://files.kenmaremindfulnessandyoga.com/uploads/1/3/1/3/131384359/f0b3882cf823.pdfIn PDF document text
    • http://zodedaw.bfreshcreative.com/uploads/1/3/1/4/131453915/woxarenepexo_baxodinojibiv_filemopun_gejofebodezixuv.pdfIn PDF document text
    • http://lusuzar.littlervrentals.com/uploads/1/3/2/6/132682076/rilobedekulo_rawaluj_mukopobupo_bodavazaraduxik.pdfIn PDF document text
    • http://files.katyitter.com/uploads/1/3/1/4/131438313/relotufimowemuf.pdfIn PDF document text
    • http://files.hopemdunbar.com/uploads/1/3/1/4/131407705/5675563.pdfIn PDF document text
    • http://pukijimif.womensquartermarathon.com/uploads/1/3/1/8/131857756/pojuzodun_sotodamakevu_pepot_veviferakaber.pdfIn PDF document text
    • http://gamopi.theworthingpage.co.uk/uploads/1/3/1/1/131164250/fuwowojaf_vuforuvadukes.pdfIn PDF document text
    • https://site-1037891.mozfiles.com/files/1037891/desubofuw.pdfIn PDF document text
    • https://site-1043291.mozfiles.com/files/1043291/nafaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f9561e-4963-46a9-a690-0afeafec7fbe/14007173473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c2ea2f-43eb-4941-9f79-a0ad0464d323/48896392613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a1c5b4b-6a37-4aa7-bb3f-72167bc66482/46537787365.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_off00008b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B72 5428 bytes
SHA-256: 8aa89249d63d682850630c0387584496e3563a1310fc6ee4f50c077ef87307c0
font_01_sfnt_off00009dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCC 15056 bytes
SHA-256: d6199179c71b2d13df8a3b9cda2f87a4e84e4efc2181d5cc7829b3d11578e09b