Malicious PDF — malware analysis report

Static analysis result for SHA-256 5304ca700414d52e…

MALICIOUS

PDF

67.8 KB Created: 2021-02-03 02:54:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fdfb29d5bb0b17a489921c6f8ab7616f SHA-1: b3e66d745a534cef7951d73d890f720d87c20920 SHA-256: 5304ca700414d52ee3fda3c497be7f4847071a8da0c6caabfd706ef91693b87a
196 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/aws?utm_term=bonafide+letter+format+for+qatar PDF link annotation
    • https://ziruxirunilexa.weebly.com/uploads/1/3/0/7/130775543/da87d58fad.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/ielts_practice_test_writing.pdfIn PDF document text
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/2cacf10.pdfIn PDF document text
    • https://wupupuredizuso.weebly.com/uploads/1/3/4/8/134894828/ab8149a.pdfIn PDF document text
    • https://narapafugoziror.weebly.com/uploads/1/3/0/7/130775848/ed5dc5184c26.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/varunofure-gewidewuboton-xebugezosiro-nugojapab.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/5671993.pdfIn PDF document text
    • https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/739d04548092457.pdfIn PDF document text
    • https://xivexibajewubud.weebly.com/uploads/1/3/1/0/131069970/ef586b06c3f7d.pdfIn PDF document text
    • https://nepejudakolop.weebly.com/uploads/1/3/4/8/134876169/32b2ec.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/sajezife/77813636959.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/22663052241.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/learn_swedish_language.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/what_is_phonology_in_linguistics.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/47013584541.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_off0000cd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD69 5048 bytes
SHA-256: b3b64fb13738af1502be7cbf226e42745668efefd4470636e8ba6bdf9a8db94d
font_01_sfnt_off0000de7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7E 10472 bytes
SHA-256: e3201321d9cdb850ee8498b4d3df8a4c01abf26b34b28f26dad95eeffc7cd4ab