Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a52113617d6c0e…

MALICIOUS

PDF

79.3 KB Created: 2021-02-13 12:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4a235bef9698c98006235b116872f1aa SHA-1: d1c891b18ab287cf3257ed72bef695b332c97501 SHA-256: f1a52113617d6c0efa8f4ce3ac33a557f3cb6d7558829b2bee49f8a66971f9f5
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an external URI and a redirector link pointing to 'baarspo.ru', which is likely a phishing site designed to lure victims with keywords related to loan modification. The document's structure and embedded links suggest an attempt to exploit users through a deceptive offer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://baarspo.ru/wix?keyword=caliber+loan+modification+success PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477156/normal_5fff7aa49e679.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5fcaa9640bb3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373985/normal_60001c9a60d2b.pdfIn PDF document text
    • http://lnstagramsupportlives.com/cch_lu_hnh_trn_pixalooptvcwq.pdfIn PDF document text
    • http://netlysy.online/57478148698aqkop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470400/normal_6022c932dd1ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488116/normal_600648ee89bca.pdfIn PDF document text
    • http://remont-kholodilnikov.website/zenisazunawotafowawulumopvssd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_600c0f4c1842c.pdfIn PDF document text
    • http://devgame.design/physical_chemistry_10th_edition_by_pqdz3z.pdfIn PDF document text
    • http://nout-prokat.website/domino_s_village_roadi51oy.pdfIn PDF document text
    • http://idealsit.space/geometric_dimensioning_and_tolerancing_ebookrmvhc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5fe90e1355d9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480582/normal_5fe51200dcc4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414335/normal_6001f4b2527d2.pdfIn PDF document text
    • http://buloshnaya.site/gefibomalae6to1.pdfIn PDF document text
    • http://organicsss.space/zombieland_2_full_movie_onlinegat45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388841/normal_5ff42db64fcd9.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/figotelodupejisovudizutfjo1.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/pevuwarobuvowa/bluelinx_holdings_inc_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/water_bottle_labels_template_free_baby_shower.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_off0000f8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C3 5212 bytes
SHA-256: cb7e914420a806c1663d92e853b715bbae041b2877985a752b3a5663e087fe17
font_01_sfnt_off00010a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 11236 bytes
SHA-256: 670e2a5511bdf7b7be2acfc1bfae1b3e906fd2c4f5e940c3294bb1b9666be3b1

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