Malicious PDF — malware analysis report

Static analysis result for SHA-256 d325b8f2ea950158…

MALICIOUS

PDF

78.6 KB Created: 2021-03-10 08:02:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2af439087d88f4b6bf65a258963c326f SHA-1: 5459f6307bc89d0bf8c55eac2d1b0a1d30ef31e2 SHA-256: d325b8f2ea950158d558d46363f273e9eb0d99847117f99e874b59758521da9f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The primary URL, 'https://maypoin.ru/strik?utm_term=how+long+does+it+take+to+boil+sweet+potatoes+to+mash', suggests a phishing or redirection attempt disguised as a search result. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://maypoin.ru/strik?utm_term=how+long+does+it+take+to+boil+sweet+potatoes+to+mash PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466675/normal_5fd7abdc1ea36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_6026f2fab3229.pdfIn PDF document text
    • http://pizabalex.22web.org/adblock_plus_android_root_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nivurerazusa/dGhcVhj/space_movie_girl_with_orange_hair.pdfIn PDF document text
    • https://cdn.sqhk.co/luwukamuku/xGijzdE/photography_scenery_near_me.pdfIn PDF document text
    • http://nuxagoliwanep.22web.org/sheet_metal_forming_calculations.pdfIn PDF document text
    • http://siwupezomejen.getenjoyment.net/form_4473_question_11_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/bo0gegg/road_crash_tips.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_5fd8938c0e9bf.pdfIn PDF document text
    • http://nanutoz.22web.org/xukevutivuposikejorudad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_60305c0331539.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikoliduxa.atwebpages.com/sat_practice_test_1_essay_samples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a8e321-3fc0-4fca-ab62-80a59daf30f3/sidajufatewaligufakekunij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00105532-b06d-4108-960e-2a8fd759591e/bubev.pdfIn PDF document text
    • http://sujobej.epizy.com/95848253319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ef23dd-947b-492e-b9d3-7a151cef1977/mokubekutubinikubal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478668ff-5ad3-4661-acde-c917c4add27d/bushnell_neo_ion_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ab6a67-f7da-4674-a19e-27ec86d43cd3/wevizoxubazolujajujem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a90590-0590-4cd7-8d42-29b511b26db0/is_wing_chun_banned_from_mma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9825bad-9258-41c4-bc02-8ed3def770a0/58919748618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411969ef-0007-4391-b00d-81a84fec2474/pandas_tutorial_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3bd5395-3b0c-4fbb-b84f-be84abce3828/romeo_and_juliet_notes_for_students.pdfIn PDF document text
    • http://keputeka.epizy.com/chuy_s_mexican_restaurant_menu.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_off0000f666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF666 5532 bytes
SHA-256: b36186bd0121cf06f862771f7361cb77d0252d6edcc6d58e95c8e502398b1ab5
font_01_sfnt_off00010923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10923 10412 bytes
SHA-256: 43cd8d09a0afe8e05984ac556930f9e75deaf6068e592934e5dc0025dbf7de26