Malicious PDF — malware analysis report

Static analysis result for SHA-256 11df425e52c1f4b4…

MALICIOUS

PDF

101.8 KB Created: 2021-03-20 17:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bcbbf6633839068dbe74b3653aeb5c3f SHA-1: aa79a2b5f2667607929157bbec1648740d775839 SHA-256: 11df425e52c1f4b4b3a25fb6715abb34eee58938fd6260d124e413c9b481ca87
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on directing users to external websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous links on disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://xezojetit.ru/award?keyword=management+of+antepartum+haemorrhage+pdf PDF link annotation
    • http://voztrans.ru/ranoxasujijisiruf3do.pdfIn PDF document text
    • http://manybigs.space/josovivurilc6et.pdfIn PDF document text
    • http://gayerkan.com/2016_lexus_nx_300h_hybrid_reviewdjapb.pdfIn PDF document text
    • http://zapapoberok.iblogger.org/passive_voice_past_simple_and_past_continuous_exercises.pdfIn PDF document text
    • http://trenketo.buzz/top_10_bollywood_songs_320kbps1h7pv.pdfIn PDF document text
    • http://tofuvuniz.iblogger.org/xifonadezabukoropejik.pdfIn PDF document text
    • http://kuzojud.66ghz.com/asus_rt-n12_d1_user_manual.pdfIn PDF document text
    • http://lifeit.pro/mebaludubofogonigufotcvxm.pdfIn PDF document text
    • http://blog-millionaire.buzz/4617859525502cn1.pdfIn PDF document text
    • http://dhl-order.info/guide_d_affutage_ciseau__boisrvlck.pdfIn PDF document text
    • http://mupizunosakoga.22web.org/10550584526.pdfIn PDF document text
    • http://mrshadow.net/288832241155xbqm.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/rikolesafuwofar/kasibasevagobiwif.pdfIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_8ccb1dbf334c488ca66c20f9d26733e1.pdf?index=trueIn PDF document text
    • http://mupevisad.epizy.com/relationship_between_form_and_space_in_architecture.pdfIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_cb5d1e2b6f534a56ae36cf8fc135a222.pdf?index=trueIn PDF document text
    • http://wodefelid.rf.gd/articulation_de_l_epaule_anatomie.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/breathin_ariana_grande_video.pdfIn PDF document text
    • http://kejidexod.epizy.com/balance_sheet_meaning_in_gujarati.pdfIn PDF document text
    • http://bezopiwuzalobit.rf.gd/17021317125.pdfIn PDF document text
    • http://gagonunanu.epizy.com/subaru_powermate_3500_generator_parts.pdfIn PDF document text
    • http://lebodixo.epizy.com/prentice_hall_algebra_1_practice_workbook.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_eaa73706725247f2839f61807cea485f.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E37 5252 bytes
SHA-256: eaf6164698a135d1d2759becb7db6abe48107e66e909879f843bc49365f647d6
font_01_sfnt_off00014ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFA 10684 bytes
SHA-256: ab9b38abb37a8a2f4d08c46216a2254ab4758cdd93b3700a6ebc3610cd4a7b51
font_02_sfnt_off00017435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17435 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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