Malicious PDF — malware analysis report

Static analysis result for SHA-256 43246e6640261a86…

MALICIOUS

PDF

72.8 KB Created: 2021-02-11 20:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0c8845276d6005a183e8280de20c79cb SHA-1: 3c2cf3848a2976f783b14992c03687181ed92f1a SHA-256: 43246e6640261a86d6151e5cfeb9b238f401afd938bd83e1150306ef9c0d4f57
274 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://crophysi.ru/wix?keyword=temple+run+1+mod+apk+revdl In PDF document text
    • https://static.s123-cdn-static.com/uploads/4461219/normal_5fff99f192180.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/752616345810vk8k.pdfIn PDF document text
    • http://women-ita.space/30144535640c05no.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_5fd700afeb0db.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/pigofud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483354/normal_60064a1d17ca2.pdfIn PDF document text
    • https://fakivafepupu.weebly.com/uploads/1/3/0/8/130873921/4183558.pdfIn PDF document text
    • http://7gusevshop.website/bsf_bharti_online_form_date_2018btaeb.pdfIn PDF document text
    • http://idealica-columbia.site/7659454950384ov8.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/2344807.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5feb08352cc87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483349/normal_6014bb0673d96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavalukato/30847962166.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/prince_george_s_county_circuit_court_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/event_page_html_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/rejerolekeden.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/avast_latest_version_free_with_crack.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_off0000d7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F2 5052 bytes
SHA-256: 08493b470d17b53563a38406dc375a9e08df91807c8c451809bfe04a66ca07c9
font_01_sfnt_off0000e90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 10620 bytes
SHA-256: c2217e7e6292e3fb415c96e20783778452c991ef64c4be7739c2326e047702ab