Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b02502f10a15d3d…

MALICIOUS

PDF

80.5 KB Created: 2021-02-28 18:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4e4a056747cab46e3a8e10321bb4688b SHA-1: 631f2369ea5856d31b00a62aebf9b1965186eb2b SHA-256: 6b02502f10a15d3d70ca0672da69532a02c28d5d2c304172288e66937edd19b9
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the PDF structure and embedded links are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=how+to+get+certified+in+amazon+web+services In PDF document text
    • http://probmaka.tech/mutedugijw3wn.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/jepjabd/37997888370.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/ghzgfje/war_and_order_castle_34_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/c5iyeia/41204338552.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/jajhbjb/sizipijatesu.pdfIn PDF document text
    • http://idealica-ufficiale.site/how_to_change_oil_on_scag_tiger_cat_2x8aax.pdfIn PDF document text
    • http://runolive.com/42506037684f47q9.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/Mhcdrib/truck_simulator_american_download_free.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/dakezawegoxapuwofoze.pdfIn PDF document text
    • http://specrazreshenie.com/initial_sounds_worksheets_for_preschoolugzvg.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/jchbVTN/wordscapes_level_8074.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/Yhhigje/baby_boy_hairstyles_long_hair.pdfIn PDF document text
    • https://cdn.sqhk.co/nakotuba/igjghd2/lethal_weapon_5.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/55908860119.pdfIn PDF document text
    • http://adanakebap.org/89830452045p4g0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/solomon_organic_chemistry_book_price.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_off0000faf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 5612 bytes
SHA-256: 5935d1c74e4c21a6a63baac7d44618109d0acf2086edc0547b7673bef09a767a
font_01_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 11536 bytes
SHA-256: f21f33f788b4284f9304bb0c52bad1712531b263aea837808527959bd38024a7

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