Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f2e5ce6190ae86…

MALICIOUS

PDF

72.5 KB Created: 2021-02-25 01:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 291c1eae74ebed8bc8102597a88e8c93 SHA-1: a961a6cb4e2181ed6e6a54ecd65611d48229f049 SHA-256: 77f2e5ce6190ae86b0380e8799880fb9434f8b3a61b40041edfc4574dd59ddbd
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=flysky+nirvana+review In PDF document text
    • https://nererudufujodu.weebly.com/uploads/1/3/4/3/134321338/ea15c.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwezomu/mjeI8Oq/sonefitari.pdfIn PDF document text
    • https://lefiletigej.weebly.com/uploads/1/3/4/5/134597596/4960697.pdfIn PDF document text
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/fapubuxovur_kakujuzovesep_duwunelajez_pomipozawuvusum.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/VijjawE/happier_lyrics_bastille_deutsch.pdfIn PDF document text
    • https://japapetokanov.weebly.com/uploads/1/3/1/4/131454126/golevanefetav_rorad_guzozifijurusa.pdfIn PDF document text
    • http://coolvdomaion.online/simply_the_best_lyrics_coverlfbsy.pdfIn PDF document text
    • http://requiredjokblog.com/unearthed_arcana_race_featslzee5.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/fuQqyeN/zorufapiditojun.pdfIn PDF document text
    • https://wixefonimav.weebly.com/uploads/1/3/1/4/131437632/2058428.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/dMn4hhw/30319235841.pdfIn PDF document text
    • http://fastdonwload.space/layers_of_the_sun_coloring_worksheetv8zqo.pdfIn PDF document text
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/sazefeduk.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/zepifudoxapo/astroworld_cover_art.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/jodorowsky_s_dune_script.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/chrome_helper_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/punuparinutimarikowikamep.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_off0000e248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE248 4952 bytes
SHA-256: fce7e82e068730cdd4e808f7560d4b048a7904eaf1fb562bb0fe6d95b2c4518c
font_01_sfnt_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 9936 bytes
SHA-256: 28727c6055a133b36d2d8fb214cc911d24398dc0bd1368ad0ba13669fcdb2bb7