Malicious PDF — malware analysis report

Static analysis result for SHA-256 282c04d7887a61e2…

MALICIOUS

PDF

83.3 KB Created: 2021-03-15 19:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 58b58f9cf402f66913ebac6e89428a77 SHA-1: 57078b5231202c5b930e60945dad022a7ab9092b SHA-256: 282c04d7887a61e2f3fa2d3a53e6e4c828a231bb2e1ed42b07dafe822fa6e844
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are hosted on disposable domains or are part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of a 'utm_term' parameter in one of the URLs suggests a phishing lure related to 'jeux de carte solitaire regle'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://zajinet.ru/aws?utm_term=jeux+de+carte+solitaire+regle PDF link annotation
    • http://bovibuvebus.getenjoyment.net/guzewadepagivafi.pdfIn PDF document text
    • https://pujawemufupu.weebly.com/uploads/1/3/2/6/132680931/faretaluwirorugedabi.pdfIn PDF document text
    • https://debovibeki.weebly.com/uploads/1/3/4/7/134715081/4fd2f7206c1.pdfIn PDF document text
    • https://nirasiban.weebly.com/uploads/1/3/4/3/134344158/535f5e7.pdfIn PDF document text
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/cd1bb3.pdfIn PDF document text
    • https://manukigobedor.weebly.com/uploads/1/3/4/4/134481395/figubiperif-nokibax.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/cara_membuat_cv_yang_menarik_di.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/888a0ea1e.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/zusexo.pdfIn PDF document text
    • http://bobositufunoto.iblogger.org/happy_birthday_banner_template_printable.pdfIn PDF document text
    • https://gugakelu.weebly.com/uploads/1/3/5/9/135965899/7539829.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/31534504464.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9891d083-1624-415d-a951-f87a18bb2476/garmin_zumo_660_update_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/37364274396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1bb0a2-d303-4763-8fff-a2079f26e8ae/67383978659.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/dusenunuzifojafepafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7529d9cc-d970-4746-8045-5f654e1fcc1e/100_free_background_check_and_results_no_creditcard_needed.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/18930919642.pdfIn PDF document text
    • http://sogisad.rf.gd/41808049963.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/85883690933.pdfIn PDF document text
    • http://vixugow.epizy.com/90572222930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6aea8e6-6aa9-4a0a-b17c-3599bfea6cdd/how_can_i_get_my_rental_history_report_for_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 4940 bytes
SHA-256: 7d1fef4e25d533b7b332cac2388b99b57bc9525348e30b6cc2732b15b2ff8faa
font_01_sfnt_off000109cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CC 11932 bytes
SHA-256: eedef7fadedfc71aaa62e78ae9cd1f055dd303b9ded9c33a9546988f7c7be04b
font_02_sfnt_off00012f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c