Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8d61a50bfa33d4…

MALICIOUS

PDF

76.2 KB Created: 2021-02-20 04:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7414f73e8b671d2efb947eca55ae1f9b SHA-1: e5428a8cbebd9b2a385619d47c1c255c499ce8d6 SHA-256: 0c8d61a50bfa33d41ee6b870e2fc7c06a37a5406e0fe8bb991d540d0fed8cbbd
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://crophysi.ru/wix?keyword=2020+rodeo+houston+seating+chart In PDF document text
    • http://ag-management.space/cloth_face_mask_near_me_uk6an04.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/metadodubuke-jilojedenavusev-gejezuzevek.pdfIn PDF document text
    • https://godebisexizo.weebly.com/uploads/1/3/0/7/130775633/5924b3c534a.pdfIn PDF document text
    • http://salon-fresh1.ru/3ds_roms_for_citra_emulator_androidjimlh.pdfIn PDF document text
    • http://dkblogin-de.best/power_washer_rental_cost_home_depot13ucw.pdfIn PDF document text
    • https://soresewo.weebly.com/uploads/1/3/1/0/131069968/nogirujoxibapupeku.pdfIn PDF document text
    • http://wisitens.online/mietvertrag_fr_nicht_preisgebundenen_wohnraumg9xux.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/litunux/1password_android_browser_autofill.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/66094676151.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/twinkle_twinkle_little_star_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/angular_form_onsubmit_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/kuwozajara.pdfIn PDF document text
    • http://sogisujomixugo.epizy.com/tere_bin_laden_full_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/aines_y_embarazo.pdfIn PDF document text
    • http://bapifodog.epizy.com/lancet_infectious_diseases_submission_guidelines.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_off0000ec9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 5348 bytes
SHA-256: 56bc45852cef496349aea162ea99438e3b86fcfc2a5ced8adc554f600aa46d0f
font_01_sfnt_off0000fec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC7 10932 bytes
SHA-256: 04e73cfb5f23fa345d8c2d8385bcaa6f9d492d0625be075818fb73879a3c6395

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