Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3bc813ef032c12…

MALICIOUS

PDF

71.7 KB Created: 2021-02-21 16:59:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: be05b3842beee73f2375c0af9fe7889d SHA-1: b59b6823859b1d89a6f3d98062e451f025349e54 SHA-256: 7a3bc813ef032c124223b37cf356c23b05967498c2385fd1b8642f6c1eaa63b8
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://jacksth.ru/wb?keyword=is%20this%20water%20sanitary%20gif PDF link annotation
    • https://lixemuvoxowogod.weebly.com/uploads/1/3/4/8/134878154/5642988.pdfIn PDF document text
    • http://mizolaresunade.iblogger.org/cbse_10th_answer_sheet_format.pdfIn PDF document text
    • https://metonokosaza.weebly.com/uploads/1/3/2/6/132681587/pemuporod_jufoxifewodoxuz.pdfIn PDF document text
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/efcd95ad7.pdfIn PDF document text
    • https://sugovodeko.weebly.com/uploads/1/3/2/6/132681033/6978062.pdfIn PDF document text
    • https://pojikajuruwasi.weebly.com/uploads/1/3/2/6/132695468/e2bd46f5e.pdfIn PDF document text
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/rizuxifa-nozagoxazubip-nonasuvoreguk.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/igogcgf/xabutidiveg.pdfIn PDF document text
    • https://cdn.sqhk.co/nedivixozu/idhmnEf/wikipedia_game_of_thrones_season_1.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/wujapu/ost_another_miss_oh_i_remember.pdfIn PDF document text
    • http://puvusevakap.epizy.com/apel_in_asteptare_android_8.pdfIn PDF document text
    • http://saduxax.epizy.com/enrolment_confirmation_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/bourree_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/82122393331.pdfIn PDF document text
    • http://suwetiwojiza.rf.gd/pneumonia_guidelines_pediatrics.pdfIn PDF document text
    • http://wimarewixogax.epizy.com/aztec_calendar_stone_information.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/43454482295.pdfIn PDF document text
    • http://pesafitibum.epizy.com/rubufemaro.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_off0000db82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB82 5128 bytes
SHA-256: d48c25fa5f256ec0f13452dd7777a6231896d35f19cbb381564670f12a3e6b29
font_01_sfnt_off0000ed0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0D 10884 bytes
SHA-256: 1866a980f0b62742504576d84e9f1d2c4c09f814a92303fc1d29cb8477e36bfb