Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8845f34662813bd…

MALICIOUS

PDF

66.6 KB Created: 2021-02-22 00:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3cb29e1b989a6096fed99d4bbdd365b2 SHA-1: 789a8ac94a56c2c28ff3ab83ae0107c3af8d86ea SHA-256: d8845f34662813bd3c3bd04036040032568ead1f8fd39c9a2289924b7b777302
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://jottigo.ru/wb?keyword=why%20is%20my%20dsi%20charge%20light%20blinking PDF link annotation
    • https://fekujize.weebly.com/uploads/1/3/4/8/134869517/misobopavipe.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/hfk09gi/car_x_drift_racing_2_mod_apk_rexdl.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/46oMohe/49366708355.pdfIn PDF document text
    • https://rekazisiw.weebly.com/uploads/1/3/0/8/130874265/ced092a3e8.pdfIn PDF document text
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/5987778.pdfIn PDF document text
    • http://jibuwuxopi.22web.org/goggle_lens_color_guide_motocross.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/LibVieK/fazatibotezep.pdfIn PDF document text
    • https://babipuwoze.weebly.com/uploads/1/3/4/8/134865032/1206763.pdfIn PDF document text
    • http://portkamesto.site/refamupolalugebananijerab13fo.pdfIn PDF document text
    • http://katerevemoposab.iblogger.org/25382015282.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/tigovatolis/noxizokefepaxotadawetuzuj.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/best_photo_editor_software_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/36721129763.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/characteristics_of_transformational_leadership_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/nutomorenidibijikosine.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_off0000c6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A9 5672 bytes
SHA-256: 0d40326985d6c54122a028b97287d8ac9175d75d77e6043ee5e41c203b0ad454
font_01_sfnt_off0000d9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DC 10396 bytes
SHA-256: dc40861e62c090a994387d43f393ba50bacbb06d4a2795932bfad4daff2e2d8d

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