Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd9ec1685c8796c…

MALICIOUS

PDF

67.5 KB Created: 2021-02-14 20:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4d1ef5e7abde3d9837be73df9540c906 SHA-1: 5a13b832675f385330efa8fa7b2c16b890d75576 SHA-256: bdd9ec1685c8796cdf6e8dca44ce708c9d238dfb9658de4b6fab4f9b6a61b846
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=ap+statistics+chapter+2+homework+answers In PDF document text
    • https://pobolibawawo.weebly.com/uploads/1/3/1/4/131437087/3722597.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/b7hgyig/fumaraxazukofofaxibajipox.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/jMhLia6/sevubepaxolen.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/OjcHshh/celebrity_memes_stickers_wastickerapps_apk.pdfIn PDF document text
    • https://sekorora.weebly.com/uploads/1/3/4/8/134856449/fodorozuneva_jugilunaduwufit_wonuvofo.pdfIn PDF document text
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/xujajidasopasuz.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/navogew3az70.pdfIn PDF document text
    • http://iglivesupportteam.com/damifinsbf1.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/cxidsgf/parexek.pdfIn PDF document text
    • http://my-credit.info/zulobebidexejpk45e.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/H2hgDge/92030606040.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/kefefetafij/62973666689.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/retawagajanape.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/fsu_liberal_studies_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/popajefuxirokukeru.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/rounding_decimals_worksheets_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/cakewalk_vst_adapter_free.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_off0000cdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF5 5420 bytes
SHA-256: 4cca23575337dad0ff214584243613996632cf7f6657ee640e6f3ae12d6a06b0
font_01_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 9440 bytes
SHA-256: 3b1faa0d85a09c1ec5f0f5b7854753d018108c9da9bc31ba1a3d5dc413f1a65f

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