Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07da2c8ee56fe40…

MALICIOUS

PDF

62.0 KB Created: 2021-02-06 13:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4b971ed2bd941c2304c45dbea64555f9 SHA-1: 6c4a7b2bfe7e7ac5337b13f1018ce4c14479a476 SHA-256: a07da2c8ee56fe40d8081f19f0e1c983ff9ac8879667769c5b80423d3fcd7447
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/wb?keyword=teri%20chunariya%20song%20%20dj In PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/kulezigezipinupafupo.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/3gftLKn/9547285448.pdfIn PDF document text
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/xutuzujivi.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/d8Fhgha/drawing_painting_colour_drawing.pdfIn PDF document text
    • http://sarkife.site/ridipubovazukujizuninxn1mz.pdfIn PDF document text
    • http://repair-monokoles.ru/hirepro_aptitude_questionsvns00.pdfIn PDF document text
    • http://baltika-trans.com/frank_sinatra_album_downloadf3273.pdfIn PDF document text
    • https://merelakududeva.weebly.com/uploads/1/3/2/3/132303156/dakupene.pdfIn PDF document text
    • https://boferisavupase.weebly.com/uploads/1/3/1/3/131384298/dimikelasoxawa-vaguzijoj-sorevepapezu.pdfIn PDF document text
    • http://kudretbozaci.com/56970420252j5o3x.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/lorifumofelu/67802450785.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/26178806020.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/jutoko.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/cookie_and_friends_a_flashcards.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/samavokupezug.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/azzurri_group_email_format.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/91299163850.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/jojinokotenodus.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_off0000b5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E2 5296 bytes
SHA-256: 083db34bfaa66063c3e0b68f9eefc2cec614a1820f02176d98945614841b2755
font_01_sfnt_off0000c7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7ED 10344 bytes
SHA-256: 7c7a4bf23bc90480f16ac6a86067c42ff619a9699e766d31da1e9c8d7bbbd9c6

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