Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a060c5b857ba1f…

MALICIOUS

PDF

70.5 KB Created: 2021-02-28 03:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1234ac769d6b4d551eec0dbc7e1579ef SHA-1: dc4f626a68c9b7af843f209644784cf31a09d774 SHA-256: b9a060c5b857ba1f4a34007f3e9648ca63c4bf4db86c1adec41aba34486f7e2b
294 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://crophysi.ru/award?keyword=baby+girl+names+indian+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_60368d921901c.pdfIn PDF document text
    • https://dawejiji.weebly.com/uploads/1/3/4/5/134505451/wezavefelibevele.pdfIn PDF document text
    • https://bobifadilow.weebly.com/uploads/1/3/5/2/135295989/ludirijelijizameziwi.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/9siatib/11055544550.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/RWro5ge/offroad_outlaws_money_cheat_2020.pdfIn PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/2184399.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/zujemajikowirezazumo.pdfIn PDF document text
    • https://cdn.sqhk.co/bitulore/hahjgj2/24520497867.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/sinadi/interstitial_lung_disease_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/kibobokego.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/dukixixavuwirajopeka.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/colon_polyps_pathology_report.pdfIn PDF document text
    • http://tufelorit.rf.gd/off_road_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/rowadetamezebixixabovib.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/waporiropisejed.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/xikiluv.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/ann_mariya_kalippilaanu_malayalam_full_movie.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_off0000d721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD721 5708 bytes
SHA-256: 0b245f9585aa0df0c9c5fd02981f2472066fb3ee7fdf68e5c4daf12432fa6f2b
font_01_sfnt_off0000ea7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7E 10184 bytes
SHA-256: 702fbb05f42908872f4f398ded2a4aa3e412f19e13ae682b1acba7f4a17199fe