Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f04b828cc166c30…

MALICIOUS

PDF

62.4 KB Created: 2021-01-23 23:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c70d818049f0c85711d5d9181eacee0e SHA-1: d6f67706828c0477c75e13fd39972f95c594c9c7 SHA-256: 1f04b828cc166c30e2f97ae950d3d516c5c9883bf3ae1015a01b2cb2060db35e
196 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
  • 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://leonvi.ru/wb?keyword=car%20x%20drift%20racing%20mod%20apk%20free%20download PDF link annotation
    • https://site-1177284.mozfiles.com/files/1177284/sadlier_phonics_level_b_grade_2.pdfIn PDF document text
    • https://site-1185743.mozfiles.com/files/1185743/92436683566.pdfIn PDF document text
    • https://site-1084247.mozfiles.com/files/1084247/sisters_of_mercy_lyrics_more.pdfIn PDF document text
    • https://site-1180563.mozfiles.com/files/1180563/trench_warfare_1917_ww1_strategy_game.pdfIn PDF document text
    • https://laziboxejebemu.weebly.com/uploads/1/3/0/7/130740401/2067944.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/tusenoka.pdfIn PDF document text
    • https://site-1175763.mozfiles.com/files/1175763/dark_souls_2_human_effigy_farming_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/TgdN2ib/28412444994.pdfIn PDF document text
    • https://site-1178182.mozfiles.com/files/1178182/transunion_canada_credit_report_free.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/zexipe-jirojom.pdfIn PDF document text
    • https://bituxomixa.weebly.com/uploads/1/3/4/1/134131270/detawaza.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/wesezuzuvalirik/32877878598.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/montserrat_bold_font_ttf.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/embryology_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/bardwell_fc_manual.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_off0000b952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB952 5424 bytes
SHA-256: a85a4383e13edd6365203e9a5f442103a204a6213e97096d75496c771f04a009
font_01_sfnt_off0000cbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCE 9524 bytes
SHA-256: d25bdf87a6acb93f5d146af8d954a2e03235cb8be27f698be5304b8cbdcefae0