Malicious PDF — malware analysis report

Static analysis result for SHA-256 53cdb2ea21d94a3c…

MALICIOUS

PDF

76.8 KB Created: 2021-03-31 08:38:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5b797848e7551b8f27c0fc25029d7fdb SHA-1: 5678b9586ba6fdcc432f73d6ce5cf332a5c29f5f SHA-256: 53cdb2ea21d94a3cdc35208bd8832c51a97b2b9b49a84cb5f60f5e2864a300f6
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=escape+plan+full+movie+free+download+in+tamil PDF link annotation
    • http://goladelexugezi.sportsontheweb.net/95364693513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_604d44d743504.pdfIn PDF document text
    • http://remaweg.22web.org/maniac_mansion_remastered.pdfIn PDF document text
    • http://gunenekaroz.mypressonline.com/2136560951.pdfIn PDF document text
    • http://wagezofon.iblogger.org/glencoe_algebra_1_workbook_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448323/normal_603b6eb87d65c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485172/normal_602ecfbaa0693.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/hp_reverb_g2_release_date_europe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dokuzijix.epizy.com/autonics_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9c5fa0-b7a2-4ebd-b763-194e4b1885c9/ninefewemefikukizine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88f7db73-b818-4746-a23a-f33f58f2dba1/minn_kota_ulterra_trolling_motor_parts.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/chuyn_t_jpg_sang_trc_tuyn.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/91425307709.pdfIn PDF document text
    • http://wuzatefiroko.epizy.com/taveruludagipiwadosu.pdfIn PDF document text
    • http://potelodifudoduj.epizy.com/takojanerakizadutuvowosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e04606b-790b-4d12-9af3-d866af9b00f6/76337930927.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/the_natural_movie_cast.pdfIn PDF document text
    • http://bigapenegig.atwebpages.com/banking_service_chronicle_june_2020.pdfIn PDF document text
    • http://romakilax.myartsonline.com/dengue_fever_symptoms_in_telugu_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/gadotuwofej.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/xonudejirubeb.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/how_to_replace_ge_spacemaker_microwave.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_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 5408 bytes
SHA-256: d4b09feef5e4367517f55e485310a3daf3c262629df1d4422956aedc1e2b57f5
font_01_sfnt_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 11280 bytes
SHA-256: 495904edb631e99f5ef7525f025cd688ef18c369e833427c623b72b1a22e90eb

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