Malicious PDF — malware analysis report

Static analysis result for SHA-256 baeb4fb97b60bbe3…

MALICIOUS

PDF

110.6 KB Created: 2021-04-26 13:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: fea58d5d400065790008819d198d2d1c SHA-1: 47257e9434b8912973f0f075dc77a0e058e76e0b SHA-256: baeb4fb97b60bbe3538dd205cccb1eb642fc87b399e871277ac2656e18d735d2
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, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily garbled, suggests a lure related to a children's play script, but the primary function appears to be directing users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=ejemplo+de+guion+de+teatro+para+ni%25C3%25B1os In PDF document text
    • https://cdn.sqhk.co/ditetona/gegj1gg/pink_piano_tiles_apk.pdfIn PDF document text
    • http://axecheat5.xyz/jeromikaduxetuger5olx.pdfIn PDF document text
    • http://ludshop.xyz/46573470371snqxy.pdfIn PDF document text
    • https://cdn.sqhk.co/taxotuzu/jgzmRPA/withings_scale_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/ihidxjh/32831470429.pdfIn PDF document text
    • http://slmit.space/booster_apk_xdakns6f.pdfIn PDF document text
    • https://cdn.sqhk.co/vipotukivisi/gdBajgi/remajatidatori.pdfIn PDF document text
    • https://cdn.sqhk.co/zugeketinog/Q4kgdhg/68516087392.pdfIn PDF document text
    • http://tonagruz.ru/riwidexedipajexemuj7hzn.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/jibjjhi/x_runner_water_wipeout_2020.pdfIn PDF document text
    • http://pss77.ru/the_crown_season_1_episode_9_assassinssqz51.pdfIn PDF document text
    • https://cdn.sqhk.co/pulovafafita/ygdkD5j/scary_prank_call_numbers_list.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/xalexojaxipud/pet_sematary_book_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190b42e1-5317-4ad5-bf53-7082e4994718/list_of_feelings_and_emotions_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/armconverter._com_fortnite.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/kirutudek.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/sidinebunimutajosuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/stihl_ts400_spark_plug_boot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab96baa5-afb3-4f0a-9b8b-6a3652779512/80936343565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96475500-0389-4877-8810-8a871b407656/air_hogs_thunder_trax_wont_charge.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/nosaxudeveguketefimub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb5c3495-5090-4e07-b3da-cccf5c996f68/25633291265.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_off00017196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17196 5524 bytes
SHA-256: f78bb6dc770b6e7301e623bdaf4381240040e907e48a7070cbef5c68ac07c959
font_01_sfnt_off0001840b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1840B 12020 bytes
SHA-256: 325be8081e86c955608db2df35da025971ed3972b5cc82786972c53ab161f4ad

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