Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ee91f546809024…

MALICIOUS

PDF

41.5 KB Created: 2020-10-30 22:04:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f13abf35ac77c0dc3a0d7d5647f8cdcb SHA-1: 7ca1cd3a1295de404cfcfba01e8a287809b3bd20 SHA-256: 43ee91f54680902455bf47e7b2044cd1eaa7e136ef645d4e54f50a59b71842fa
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.me/123?keyword=whatsapp+plus+apk+free+download+for+iphone In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/xelikanotuzifaja.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/noterufuwuxavo.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/jumedemimo/wugeke.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/xowamawedonugijaduguwagat.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/32284458305.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/changes_in_state_crossword_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/20618687635.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/an_astrologer_s_day_summary_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/21430313232.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/jakowijupaba.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/39661521121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b1412ae-88d7-435f-af8b-1d0c5049022d/83695872589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323df89a-7675-4a20-8fb4-e1b623ca55e8/63533769795.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/gifiduxuvo.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_off0000655e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655E 5300 bytes
SHA-256: 5e1c3b4142cb7981c312eec4292c2cb00eb2e10071be2b2d06152e0432aaa30d
font_01_sfnt_off00007777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 9988 bytes
SHA-256: 61e9c8e8195aec5db5114faea88799c93f15bc6097c79b35fe96b80c8a8e0fc1

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