Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e7f05dda5cdb40…

MALICIOUS

PDF

80.9 KB Created: 2021-03-14 04:21:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c6334d5f3d7617c43621c1734a306a64 SHA-1: 090caa46836e4ad288c32de1defad463484d5628 SHA-256: 53e7f05dda5cdb40c84c527b9aa2f4128d8cc01dd3376806f4525254c66cd93e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/award?keyword=marketing+techniques+to+attract+customers+pdf PDF link annotation
    • http://jirafka.space/lagu_arabic_house_music_remix_20178wqvr.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/jd5Tiji/rc_stunt_racing.pdfIn PDF document text
    • http://montana-media.com/metforas_da_vida_cotidiana_george_lakoff9v0hn.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/oEjaihu/15637328274.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/YnbiDnh/okcupid_apple_email_scam.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/why_do_rabbits_change_color.pdfIn PDF document text
    • https://cdn.sqhk.co/nujoxodove/5t2ggoM/198999470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391921/normal_604a8e7951237.pdfIn PDF document text
    • http://meetsalle.xyz/vetajusemibasivebipasinolfxq8w.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/creative_sound_blaster_z_settings7241y.pdfIn PDF document text
    • http://uplrezina.site/197449230441n17y.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/fhdjcje/fumulusevojapubijibebof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_602d09f851cab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394071/normal_5fde0857ed8e2.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/40565649116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidodexogejax.myartsonline.com/mupoviwijig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60c68d3-75d3-4bef-b84a-9638106cf806/56375638607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93df8dfe-c66c-468a-bd4c-238d7ba9177e/would_you_rather_questions_for_kids_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/gubefop.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/standard_pcr_protocol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a4753a-078c-444e-9696-82104b258d15/wefisukorizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e971efaa-5521-4c3b-89b9-dd97f36d07a3/what_is_the_wps_button_on_my_modem.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/revista_boticario_ciclo_8_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/guides_parc_chevreuse.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_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 5732 bytes
SHA-256: 9be0e8faae189b96657ea78feddc5cba475891f1940df0307f27c96cfd7d9cfb
font_01_sfnt_off00010fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 11224 bytes
SHA-256: f159f8474cfb779da3529a86fac3d05f5119c9d4c10b71506f029db3c6eee666

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