Malicious PDF — malware analysis report

Static analysis result for SHA-256 55dc2f0037354f24…

MALICIOUS

PDF

71.8 KB Created: 2021-01-30 15:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 45559a6bc238f60c8245550bed9842b5 SHA-1: 8f16627de0521dc64ae2fc4ad6dc4517e7cd8fc5 SHA-256: 55dc2f0037354f24ea1fdc01080a06e2fa3d4844d82f6b7fbdd5641c5fe889b3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/aws?utm_term=manikonda+weather+report In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_601128fe6c2af.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/ltibigc/rc_car_race_tracks_california.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422659/normal_600832b84024e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_5fd185db6a64f.pdfIn PDF document text
    • https://cdn.sqhk.co/milevatomog/hdgcgz7/jipomefimowifeguv.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/xgi6heS/samolugixijixetexi.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/d0Ud9UR/pofijatesufadedelun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_5fd62af5b5ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_5fe9aaec9a56c.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/nhchfii/baby_boy_red_patent_shoes.pdfIn PDF document text
    • https://cdn.sqhk.co/mazoviwovusi/othbjci/free_movies_2019_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/H7hcjiF/drum_set_price_philippines_olx.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/bokelur/narevubobiforajinamutidiz.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/xuwilifak.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/seth_curry_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/integrator_and_differentiator_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/walmart_corporate_sustainability_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/85283448490.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_off0000dba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA6 4996 bytes
SHA-256: 15d430876d19aef3c15f813431a586120a3b341f7cd6524f78c67c72545c7994
font_01_sfnt_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 10816 bytes
SHA-256: c1e4cbd9fd202beb78fe2206d25544417a7b13334e92bacf7c9c298b664a15e3

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