Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c27247978176ed…

MALICIOUS

PDF

80.5 KB Created: 2021-03-31 15:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c2dbdaab4879a2f16a7023bd43cc332c SHA-1: eba23eb3031befb0596beaf0d5eaf7b2f49bbb46 SHA-256: 46c27247978176edff89af8182cbea392680139c1ff3ae93cc9e3cc138ec66a4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain 'soxebez.ru' that is likely used for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'public holiday 2020 singapore pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=public+holiday+2020+singapore+pdf PDF link annotation
    • http://vannabanyavsedela.xyz/how_do_u_say_pencil_pouch_in_spanisha2k8o.pdfIn PDF document text
    • https://vizokajobekaxa.weebly.com/uploads/1/3/0/9/130969885/lejazaf.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/rakomafatuzokukikurobe.pdfIn PDF document text
    • https://vadiduriku.weebly.com/uploads/1/3/4/4/134445950/gerenojobibuxo-xibopobatulabaz-lexopegixiv.pdfIn PDF document text
    • https://tijisifexabid.weebly.com/uploads/1/3/1/0/131070771/4379613.pdfIn PDF document text
    • https://piziwola.weebly.com/uploads/1/3/1/3/131382430/nutigav.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/56958837393.pdfIn PDF document text
    • http://pubggaming.online/guburiruler5o93n.pdfIn PDF document text
    • http://copyrightreports.com/kenmore_model_116_power_headf6nxx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f664abdf-34c0-49ca-8877-aa40c02de50d/niragiwowasobegogufufum.pdfIn PDF document text
    • http://nabiporemug.epizy.com/pevilexubabif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fddb439-3032-4116-8b16-bc90411ae5c1/22737285965.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/aortic_root_replacement_aha_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/airbnb_cereal_app_font.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4fb799b-bc8f-4ecc-8090-b9f3a0efab41/how_to_use_a_double_bubble_thinking_map_youtube.pdfIn PDF document text
    • http://towaduzabuxake.rf.gd/fuxuxikexidima.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/tukikinakitepep.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_off0000f843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF843 5936 bytes
SHA-256: 8e6d3b4a34bbcaaea206c5bd381ebbb57a411ba7318a4a0d2717a5b4f7a136a0
font_01_sfnt_off00010c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C71 11812 bytes
SHA-256: 555135729bda1f93842dfdfc03c73c60bcb8159ca9b1a80b73d7dcbf03e7ddc1

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