Malicious PDF — malware analysis report

Static analysis result for SHA-256 4877e11143aa9d0e…

MALICIOUS

PDF

67.1 KB Created: 2021-02-06 22:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 96dd630c560e5645cef57ad55cff2948 SHA-1: 896c80a093f570e1c4043ca19e9e6e5924c7fb50 SHA-256: 4877e11143aa9d0ea3ffd280aec7080866d25decda2db969baca618ec14d3fe4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wb?keyword=label%20ant%20body%20parts%20worksheet PDF link annotation
    • https://jomefibid.weebly.com/uploads/1/3/4/5/134596324/fe33ea498ab4.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/kakaj.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/7456534.pdfIn PDF document text
    • http://pidawiwosoda.iblogger.org/94902839782.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/p0egjpv/sakejipoxezumiveg.pdfIn PDF document text
    • https://cdn.sqhk.co/vavegewumur/qPULhcQ/xutifivipomepodubi.pdfIn PDF document text
    • http://worigozuwujuva.iblogger.org/beginners_guide_to_breeding_rabbits.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/X8uhgRA/vemoregegirufixuzaninat.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/lodazojamuva/64206629433.pdfIn PDF document text
    • http://paxuxezu.rf.gd/literary_criticism_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/esic_maternity_leave_form_21.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/kiramalijotejowedot.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/fopinonebivuvelulisef.pdfIn PDF document text
    • http://gefegasoro.epizy.com/letetomukigud.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/xategomanofeluropakajal.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_off0000ca69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA69 5384 bytes
SHA-256: 3edf6a0795ed0fb7a6fb1459d6b44d207c585a003d0ba20e6902bafa9c8aa7c6
font_01_sfnt_off0000dcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC1 10280 bytes
SHA-256: b60fdadb41d26870ddd6ad43157c4a28dba23d4629659feae38b9f6c50468262