Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28e7836109ed7ea…

MALICIOUS

PDF

38.6 KB Created: 2020-10-06 18:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f2bed0043201fbf4d1908e98fb4f2b20 SHA-1: 27095a1c23c87ad921babc717f2b50915eef46ae SHA-256: b28e7836109ed7ea44dfba8c71c0eeb7ca51a94de16f521691f159cb13923170
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ttraff.link/pify?keyword=ge+spacemaker+microwave+manual In PDF document text
    • https://site-1041672.mozfiles.com/files/1041672/2714089839.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/87530571450.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/25343299072.pdfIn PDF document text
    • https://site-1036667.mozfiles.com/files/1036667/kebadupejixejisofuvutofo.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/kinoxupaxumubemozezog.pdfIn PDF document text
    • http://files.femmebeautylounge.com/uploads/1/3/1/3/131379832/3f57bbbd10c.pdfIn PDF document text
    • http://zugota.seedsofhopefdn.org/uploads/1/3/1/3/131383544/f320bbf908dba.pdfIn PDF document text
    • http://wobas.emsinsider.net/uploads/1/3/1/4/131408027/wimopulu.pdfIn PDF document text
    • http://files.stephenlotus.com/uploads/1/3/1/4/131438308/3668112.pdfIn PDF document text
    • http://files.theowlfrompowell.com/uploads/1/3/1/4/131408103/1250656.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85bf3a3-cb9a-4ac1-95a2-1d5e0bfdb3f6/tibovanapupezus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e8584e-23a0-47b0-92a3-fa1b884da5d7/miwilirekukat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b4742b-3c9c-4db7-ba95-8ef1b345e72a/bapuxifuxolokoguboxutemur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60a566f-bcd2-4df0-afa9-4f906ff56692/woxakojumunojofuzobapedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2577/0914/files/ucr_school_of_medicine_jobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6015/2488/files/35947551803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8961/7311/files/29209773466.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_off000057d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D7 5328 bytes
SHA-256: 2970b745d64f3b11624cc0f848ea7bd095127e2795528387362dc7c6d0105e71
font_01_sfnt_off000069fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FB 10324 bytes
SHA-256: 9f016e04b1416c97e9547cf80b0af05fe46ba1e3c1ae390d2d6911381cb7e49b

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