Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a9376f8adc8a3a…

MALICIOUS

PDF

68.0 KB Created: 2021-03-06 02:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 99fe713aaa28819f5e4a509b3ca640cb SHA-1: 5f30f1126f9296b02bd1ad94eff2102644e7f689 SHA-256: 38a9376f8adc8a3acf85f7fe732d4ee5e0e14610fb644b50f1fb53fbb3e8b90c
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/wix?keyword=career+clusters+worksheet+pdf In PDF document text
    • http://gejejasofubi.mywebcommunity.org/the_tale_of_peter_rabbit_characters.pdfIn PDF document text
    • http://fubikopelemom.mypressonline.com/75000889455.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/91607571057.pdfIn PDF document text
    • http://xuzobinemipivor.mygamesonline.org/novibotebalek.pdfIn PDF document text
    • https://rosowimibezot.weebly.com/uploads/1/3/5/3/135392622/jofafodigutedaz.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/the_sims_3_university_life_how_to_get_credits.pdfIn PDF document text
    • http://zanodopowe.sportsontheweb.net/94561111705.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/funitonawimewi.pdfIn PDF document text
    • https://lomapasaxanigef.weebly.com/uploads/1/3/1/1/131164081/493693.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/fojaxexino/87533279738.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/podoraxirijataduf.pdfIn PDF document text
    • http://jimarol.myartsonline.com/house_of_night_tv_series_netflix.pdfIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_0d2f7b2be63c4f6786c49ad36989953e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wurivuve/2010_chevy_tahoe_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/how_to_implement_scrum.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/coopervision_proclear_toric_multifocal_fitting_guide.pdfIn PDF document text
    • http://gafodix.myartsonline.com/how_far_is_voyager_1_from_earth_2019.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_8bc038bd8cba4553aa0cb57d9442fe67.pdf?index=trueIn PDF document text
    • http://duvodix.myartsonline.com/gidubizivudizir.pdfIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_ce54304128a246f488db7bbbece53226.pdf?index=trueIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_7ab54565b88e4ee49c4f342a0fdff0b6.pdf?index=trueIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_95ba71f829474790b94915249ebdf106.pdf?index=trueIn 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_off0000ce9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9E 5304 bytes
SHA-256: e089da4b3b68cbd6d29a81963cfe3d60073c0d65551b0f276531c44d1bad532b
font_01_sfnt_off0000e0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B3 9852 bytes
SHA-256: 566623bba138bfdaed5382831987aace5306f8e5349935ba94f91cff04376a6d