Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed98f986b4c3bcf1…

MALICIOUS

PDF

67.3 KB Created: 2021-01-09 03:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 4c411504e6b05633251551307f73bb8f SHA-1: b8fbe6e8f5491dd25586d25a66e01ff28c8ef5ab SHA-256: ed98f986b4c3bcf1967d20b4cd8405c8728377ae1b8c880fe52588dc65edc5ac
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=geometry+area+of+a+circle+worksheets In PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/tifej.pdfIn PDF document text
    • https://pudijeda.weebly.com/uploads/1/3/4/5/134586696/pifax_gatad_xepuk_novege.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/wezavite.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/vabikadapetota_dajeseni.pdfIn PDF document text
    • https://konozobit.weebly.com/uploads/1/3/4/4/134456152/9316254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ccc8ca9-5963-4609-a44a-f9fa4cae17a6/38242355041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f841732-7a69-4460-a7b1-c5d900ce4a6d/tibup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b43cd0c8-b65e-43d8-8689-91065510b6e3/21034966737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042f0b04-f662-41b5-ba27-96df2110b69e/57773619976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14d2ba9-c0bd-43be-b7f1-f370bdddf979/white_2_rom_exp_patch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3db2290-fd88-40c1-abb7-f6434877b5d8/merry_go_round_chemistry_single_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf7ddae-87ca-4898-b98a-251c3a552241/zekujovuzewisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ffeda9-7216-40af-af58-041dca2d5f08/full_steam_staffing_nj_geneva_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a54aaa1-8e35-4873-b64d-1358c8b9487f/tomofosir.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/72131222329.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_off0000cc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9F 5408 bytes
SHA-256: fff74661e1f777d92c30b83458cfa153f160e7df2c1904578905ddd666ba915a
font_01_sfnt_off0000def6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF6 9696 bytes
SHA-256: 8f9da6eee9453cef16431c791e36878d70c9addef4cef15380c2bac3f28e6b58

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