Malicious PDF — malware analysis report

Static analysis result for SHA-256 720f92fc444bf1f6…

MALICIOUS

PDF

76.8 KB Created: 2021-04-19 05:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: db5cbbacb1fa014b9a952572de04ceba SHA-1: 219246d5b763b9ff14badf7342ca6d0ce4f1b1d3 SHA-256: 720f92fc444bf1f6a574bb85f3e74e47c69a78f9b9e45496ec8dfd579f8baa20
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing lure, employing SEO tactics to direct users to a redirector URL. The presence of numerous external links, many pointing to Weebly-hosted PDFs, suggests a link farm designed to improve search engine ranking for the malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://xezojetit.ru/strik?utm_term=english+speaking+practice+app+download PDF link annotation
    • https://bogilerilixami.weebly.com/uploads/1/3/5/3/135345361/biposepolupix.pdfIn PDF document text
    • http://debuged.mywebcommunity.org/64949875973.pdfIn PDF document text
    • https://degufulu.weebly.com/uploads/1/3/1/3/131379990/neridabog.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/66856757075.pdfIn PDF document text
    • http://coupons2020.info/is_introduction_to_psychology_hardoiam8.pdfIn PDF document text
    • http://nawitebexu.medianewsonline.com/blkoviny_chemie.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/7590741.pdfIn PDF document text
    • https://logifuvixejexa.weebly.com/uploads/1/3/6/0/136019385/1603553.pdfIn PDF document text
    • https://rewegabelera.weebly.com/uploads/1/3/5/3/135390500/pufibive.pdfIn PDF document text
    • https://dimawirosaj.weebly.com/uploads/1/3/3/9/133997296/9492688.pdfIn PDF document text
    • https://nezasitize.weebly.com/uploads/1/3/5/3/135303973/bizemikuxezivumulagi.pdfIn PDF document text
    • http://twoup-viktoria.online/citizen_eco_drive_radio_controlled_watch_manualawwnc.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/nuxomigo/renaissance_art_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/58723609636.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/club_car_parts_dealer_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/ground_sheet_argos.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/how_to_record_vhs_to_dvd_on_panasonic_dmr-es30v.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/on_the_way_music_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/79507977571.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/girl_names_in_vishnu_sahasranamam.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_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 5448 bytes
SHA-256: 46243b4217b66992e80fbca3a707d43c55223575aca8cc02829b003e67103d62
font_01_sfnt_off000100ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100ED 10956 bytes
SHA-256: 959b13c405f5e0f58acbe90fee178d5ade65a7f4d5a5fa39152df137381972a5

Open this report in the interactive analyzer, or submit your own file for analysis.