Malicious PDF — malware analysis report

Static analysis result for SHA-256 44afe0ffd4005ee4…

MALICIOUS

PDF

72.0 KB Created: 2021-02-21 19:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4b87f3c9369a28f98b34b156820023d9 SHA-1: 83a401e3ca1f9a067d6d45476d52c3566dd8ebb1 SHA-256: 44afe0ffd4005ee46412b1887353f734af0e46862c75769dc29c46f8ded82481
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/wix?keyword=dungeon+hunter+5+hack+tool+no+survey In PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_5fd8dc670c903.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/536e7.pdfIn PDF document text
    • https://vijejomikozo.weebly.com/uploads/1/3/4/6/134668467/6d62b551ebe2.pdfIn PDF document text
    • https://duroxogudoli.weebly.com/uploads/1/3/4/3/134318703/7682362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404987/normal_5fce9a490e60b.pdfIn PDF document text
    • https://xezatitewifesel.weebly.com/uploads/1/3/4/3/134393938/8262690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_602140e117880.pdfIn PDF document text
    • https://pewuwokajop.weebly.com/uploads/1/3/0/7/130775265/6249289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5fcb72e38b63d.pdfIn PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/470937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447884/normal_5fd317cf710dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489441/normal_600d78f1b1745.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fca64393b2ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415527/normal_5ff02548c1d0b.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/kiguteperilodu/mathematical_methods_book.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/par_guide_to_2019_constitutional_amendments.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/welevemusosemadumonaf.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/kemaf.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_off0000dcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC9 5408 bytes
SHA-256: 52190665fc82cef7fcc68e4c95c5d18a5c432c3cdb90d234fd657c902bdbc5ef
font_01_sfnt_off0000ef40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF40 10256 bytes
SHA-256: 8546d8cfd5e9b86439012f67b1ce850bb859ce1276aafa67478cad299e0459da