Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3b5ab8abf58fd2…

MALICIOUS

PDF

74.7 KB Created: 2021-02-11 09:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 81096ae6c8e8619cc222fcc856b84d6c SHA-1: 69b5550edce12ca92b12468d9ed0742c6cdeabd2 SHA-256: 5d3b5ab8abf58fd2bc6fe9a744499653acd6521265151c3886f853226177ad36
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://bologen.ru/aws?utm_term=alopurinol+300+mg+bula+pdf PDF link annotation
    • http://physcoo.com/88126835055vrac6.pdfIn PDF document text
    • https://luvoseguz.weebly.com/uploads/1/3/4/6/134665560/2408623.pdfIn PDF document text
    • http://test123test.xyz/44991937017uqzkj.pdfIn PDF document text
    • http://urott-hu.com/tutorial_java_programmingv8zsl.pdfIn PDF document text
    • https://cdn.sqhk.co/sesumaku/ghfzhfW/52106534810.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/rokitobuzotomir.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/99379420847.pdfIn PDF document text
    • http://gufutaca5.xyz/us_gaap_20209ufum.pdfIn PDF document text
    • http://vknart.xyz/la_forma_bidimensional_significadow2lts.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/gapuruxumeg/40158817835.pdfIn PDF document text
    • http://wapowidomuf.epizy.com/44493400822.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/blurred_background_for_android_application.pdfIn PDF document text
    • http://rotaduwifomol.rf.gd/79588401612.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/93756994418.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/34652642244.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_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 5616 bytes
SHA-256: 55b08ed6931cd9adff50b258625bca78fb8e678ca7416c92df5d7828c5e1c8fa
font_01_sfnt_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 10676 bytes
SHA-256: 3dd4557ddc456193aed22b8a8f6e744ea821ec84ce5775593ba340a88ad212f0