Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e9282af728d9a7…

MALICIOUS

PDF

72.8 KB Created: 2021-03-02 20:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 13197a27c6dd2c76ad66e23082bfc848 SHA-1: 9cb04c16e1918d4b8b9ce70052bee423ef4d6742 SHA-256: 10e9282af728d9a7f5d6df54a9e69ea8ae64a8bbacd686e4c114574f116a821c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=they+say+i+say+chapter+4+exercise+1 PDF link annotation
    • http://jonuzukuforab.iblogger.org/kojebojijopuxowenososo.pdfIn PDF document text
    • https://nifatukipukixe.weebly.com/uploads/1/3/1/3/131398430/6907612.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/Mjdjbgj/69473173503.pdfIn PDF document text
    • https://kudiwugeditonaf.weebly.com/uploads/1/3/5/9/135964520/tedotuv.pdfIn PDF document text
    • https://labatozun.weebly.com/uploads/1/3/1/6/131607827/e4d729.pdfIn PDF document text
    • https://kurinasuvofete.weebly.com/uploads/1/3/5/3/135334761/tuseta.pdfIn PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/ad371a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xirixepo/bironorovuk.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/bhakti_song_dj_mix_2013.pdfIn PDF document text
    • http://vumesurev.epizy.com/arduino_nano_board_price_in_sri_lanka.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/nowazekam.pdfIn PDF document text
    • http://xiwaresijo.epizy.com/pidokipoxesu.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/immunology_essay_exam_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53C 4820 bytes
SHA-256: 4ef409233913a72c8268a228adf17c3b7b2468784980cad4d385afd493faeb3e
font_01_sfnt_off0000e5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 10176 bytes
SHA-256: a287edcd9dbc50eead71e36212a6e10bf2e601a398b790e2a6e663da3f9f9841
font_02_sfnt_off0001088d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333