Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5844c0bc0b5473…

MALICIOUS

PDF

73.3 KB Created: 2021-01-10 20:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4595523d314b5aed192da4bace126d01 SHA-1: 884c5efa20699792413c08af2d9834a8ebb63ca0 SHA-256: aa5844c0bc0b54733a93914310f30e252b355721a42fc3e95372bcccf5865d28
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://gettraff.ru/wb?keyword=global%20citizen%20year%20jobs In PDF document text
    • https://site-1168079.mozfiles.com/files/1168079/detention_netflix_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/hiHhggf/draw_me_as_an_anime_character.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_5fba98f4db685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_5faf45a79f09f.pdfIn PDF document text
    • https://xaredeni.weebly.com/uploads/1/3/1/8/131871979/sufogufeg_zozavenoligot_gesadonababoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fdc8b55804f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5f9387333133c.pdfIn PDF document text
    • https://site-1173778.mozfiles.com/files/1173778/dutevanojob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f90669ab4ebc.pdfIn PDF document text
    • https://pojirada.weebly.com/uploads/1/3/2/7/132741169/zofok.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/jixeremipet/articulate_storyline_2_full.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/14948792244.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/shower_head_adapter_female_to_male.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/google_sheets_python_github.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/lebujogifavipaw.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_off0000e29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29D 5192 bytes
SHA-256: 0a1804e6fbb083158f502358b370894403b371d3ff119b09f4f9b4fe5f94525a
font_01_sfnt_off0000f46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46C 10664 bytes
SHA-256: 808214ba8090a93c9ccbd903df60571eca7fa0304ad51a1f33e2d914bc0a40e1