Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a80d27e197b50e…

MALICIOUS

PDF

197.3 KB Created: 2021-03-25 13:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bb06217300ab7b360d2acb35ae29dfb8 SHA-1: 216c4de406346da4d4589622b3348217ee829b58 SHA-256: 29a80d27e197b50e6c629e61fcc149ed0a669fe187c42426042cba91f6d284a3
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as free reading materials, which redirects to a malicious URL. This URL is flagged as a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 5

  • 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.
  • 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/award?keyword=brzezina+pdf+wolne+lektury In PDF document text
    • http://nibofope.66ghz.com/childrens_mountain_bike_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/YiggjgX/rupodewakiga.pdfIn PDF document text
    • http://regsen.website/automatic_control_systems_10th_editionod9kk.pdfIn PDF document text
    • http://cashfree.store/831067162520u9gg.pdfIn PDF document text
    • https://cdn.sqhk.co/milagaleja/fCSs2hb/analisis_de_foda_en_enfermeria.pdfIn PDF document text
    • https://cdn.sqhk.co/fajaleniwa/ifjdwhi/81429137875.pdfIn PDF document text
    • https://cdn.sqhk.co/dawupana/Vjkjahe/26599303906.pdfIn PDF document text
    • https://cdn.sqhk.co/didatife/73NjP0H/digicel_sales_application.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/96568397416z8lwo.pdfIn PDF document text
    • http://sakhavto.ru/windows_98_img_dosbox_download7ecln.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/62686f58-3a34-47cf-abdd-a25cdc113d68/sefut.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/dungeon_fighter_online_kunoichi_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169e3a1d-2f3d-440a-be03-a3e73634d4e7/how_to_change_code_on_liftmaster_formula_1.pdfIn PDF document text
    • http://zukolokemegizut.rf.gd/mamevowazod.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/adjective_form_of_mourning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d4933e6-8b8b-4456-85b6-d3bbff38cab3/42011132614.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/punuwupifugovofubilipab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ae03c3-3192-441b-97cc-38906c400e2b/28947657067.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/61470316205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d26864-ec6f-483a-b17a-493c3fc089c1/37991065841.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ce15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE15 5216 bytes
SHA-256: 40a054d3820eea02d0e32099395c22052afb19350ea814862da97f8fca9e9084
font_01_sfnt_off0002e005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E005 11720 bytes
SHA-256: d6dab3d37c07d0a9b626c21d5628c2d5549d78c25c7b5b4114b1c99ebafa3108

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