Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2f4cf3adef70fe…

MALICIOUS

PDF

72.7 KB Created: 2021-02-24 18:17:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 88a863e52be692d28414a391c53d24d3 SHA-1: 35b1cd2842c02bc722f4205437adfc00eddc81de SHA-256: dd2f4cf3adef70fef49198c1d459e20960b4df8aaef62c63fb7a5e736a8ee5d2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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://yafferge.ru/award?keyword=is+ge+cafe+good In PDF document text
    • http://obschee.xyz/dotabotagadele555y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493569/normal_602819c4331e7.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/arua_chaula_duba_video_song5c6pa.pdfIn PDF document text
    • http://idealsit.fun/nuwuxanaganapuvobutanozagkesf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447450/normal_5fd25384550c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458838/normal_5fc98a2572edb.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/what_is_dataset_object_mcq.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/tixowagowiz-lanijega.pdfIn PDF document text
    • https://fujerituzaxu.weebly.com/uploads/1/3/0/7/130775231/2184449.pdfIn PDF document text
    • http://befigter.xyz/dapurulrd2.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/7444965.pdfIn PDF document text
    • http://newyearshop.site/vefodebejujumetasimb6wpu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gipebevu.atwebpages.com/64727914285.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_off0000e23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 5000 bytes
SHA-256: 4e4d31045f275cd92c863a6d72f1d4488194c1320524b70fb27f640930d282c7
font_01_sfnt_off0000f358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF358 10156 bytes
SHA-256: ef679acdd73e182f45583f37fd6b4fd6cd7c8343e70de109d349d3ee4071e571