Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a623c9fa0959aaf…

MALICIOUS

PDF

79.4 KB Created: 2021-01-25 21:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b3494d318e5e39f30ab7faeb097b1e7b SHA-1: 69f5be7753c93abf83e79df50b82f54f5833e3ff SHA-256: 9a623c9fa0959aafd1c13ce14bd537886efd6bf50ddbfc2b1368a4b599c07c9a
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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/aws?utm_term=anti+spyware+android+gratuit In PDF document text
    • https://dexovepiniputo.weebly.com/uploads/1/3/4/4/134400909/vovutuxedo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367625/normal_5fceda95aff90.pdfIn PDF document text
    • http://operationhomeplate.com/survival_rate_stage_3_breast_cancer_lymph_nodesih91p.pdfIn PDF document text
    • http://lisojuribopuwad.22web.org/14915370990.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/b01rjas/living_room_furniture_sets_for_small_spaces.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408471/normal_5fefa5962932a.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/7754519.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417536/normal_6006d54bf1afe.pdfIn PDF document text
    • http://wilitubejibo.iblogger.org/jixesalesidototoguda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424330/normal_5fed9d978bc04.pdfIn PDF document text
    • https://nofefikow.weebly.com/uploads/1/3/4/5/134510094/09c929.pdfIn PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/mewivojove_bumoposutuvav_tofepekubefode_jufasomolaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/ha10iuT/nbc_sports_bay_area_stream.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/takurugilij/california_king_bed_sheets_costco.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/synonym_crossword_puzzle_rv-_12_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/vekol.pdfIn PDF document text
    • http://gazepofibugas.epizy.com/fuzuwurutagiborusegil.pdfIn PDF document text
    • http://sepuxukejobome.epizy.com/lolezosajonav.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_off0000f8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 5280 bytes
SHA-256: 69131ec8b84574290b58ab63bc283bd6d1771380ae8559ea3c65f75d68eea992
font_01_sfnt_off00010b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B16 11420 bytes
SHA-256: 706ea7dcf1840a1e0f909711c91a492057827057eadef5a2d644f69d598a4b1f