Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b51c79ee9934fd…

MALICIOUS

PDF

79.1 KB Created: 2021-05-30 05:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 909d1f8d4517371c73e284fc3328f71b SHA-1: 7a0ff1f88d83b324efff845862d89d4823279d07 SHA-256: 61b51c79ee9934fd3fe9e276a1e4a53c36f184bc7969f5b076948943ce08f31b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to host a large number of links, likely for SEO manipulation or to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=monthly+budget+report+template+excel
    • https://zeduwekikozive.weebly.com/uploads/1/3/6/0/136050246/kudof_famigit_pedoxepodoz_makudodopotizik.pdf
    • https://kuvobawodamelis.weebly.com/uploads/1/3/5/3/135350379/zaketifovomifewabin.pdf
    • https://ratewanevunexem.weebly.com/uploads/1/3/2/6/132681210/dajilakuxojugebo.pdf
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/444669.pdf
    • https://xilapadoz.weebly.com/uploads/1/3/4/5/134588650/93ddf454f837.pdf
    • https://dujodorenenap.weebly.com/uploads/1/3/4/4/134488447/dugivatojobebu-vogovoz-bosozatazadu-geleban.pdf
    • https://galexoraka.weebly.com/uploads/1/3/4/5/134524836/2005376.pdf
    • https://gupifamerimim.weebly.com/uploads/1/3/4/1/134132082/wobifafiz_besos.pdf
    • https://nunezexivu.weebly.com/uploads/1/3/4/4/134440215/8985191.pdf
    • https://katebobuwusa.weebly.com/uploads/1/3/1/3/131384636/b9e36adaf1e.pdf
    • https://pareruli.weebly.com/uploads/1/3/4/8/134891857/lomopumaxizebi.pdf
    • https://muboxofibadufus.weebly.com/uploads/1/3/4/3/134310828/4774998.pdf
    • https://lerinaxupol.weebly.com/uploads/1/3/4/6/134662503/c6c345d9b10855.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/88bd193a-9685-490c-9e71-c5c810419a75/sony_acid_pro_7.0_keygen_free_download.pdf
    • https://uploads.strikinglycdn.com/files/a3b3a5fa-c547-405a-ac33-202161a7b9f7/butokipokifuzekinixeb.pdf
    • https://uploads.strikinglycdn.com/files/25b2b937-398a-47ed-867d-fdba357431d8/philips_voice_tracer_dvt1150_review.pdf
    • https://uploads.strikinglycdn.com/files/2540438d-b5d8-4ae4-a83b-381427aae18b/bafefabebu.pdf
    • https://uploads.strikinglycdn.com/files/f182c727-e7c3-4cb5-860c-c7bb8722299c/speed_queen_stackable_washer_and_dryer_dimensions.pdf
    • https://uploads.strikinglycdn.com/files/0f2920d4-dc9d-4a4b-8895-66b7b058b298/how_to_figure_torque_on_a_bolt.pdf
    • https://uploads.strikinglycdn.com/files/5acc0c55-fc91-4e4b-a856-ef4c6a7b1ddd/etica_para_amador_libro_completo_por_capitulos.pdf
    • https://uploads.strikinglycdn.com/files/3eced10e-ce2f-4b03-ad3e-a1490641c24f/is_komodo_a_dragon.pdf
    • https://uploads.strikinglycdn.com/files/729dcddc-fea1-4257-a347-2a1896c69878/rebirerebimilu.pdf
    • https://uploads.strikinglycdn.com/files/7137789f-e467-4c0b-85b8-795ba5c198b6/norton_anthology_of_american_literature_table_of_contents.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f504.bin
2c58f56c92e1b32065316eed79a8776d4cf018fb34734fa2185d909daa763fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF504 5624 bytes
font_01_sfnt_off00010815.bin
592da411dd29f7518904eff53c04c51b04e51cfe9d8df4746102110bf7bb9620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10815 11040 bytes

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