Malicious PDF — malware analysis report

Static analysis result for SHA-256 5400e5dcb734fc82…

MALICIOUS

PDF

79.9 KB Created: 2021-04-08 01:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5181de2bd0978a7db519ee4a1d1a1f30 SHA-1: 463e4a57f6713c82e65f46a2e14da9276582363c SHA-256: 5400e5dcb734fc82a387c7b6c774d73fbf3e770642219d274b3c06f363805b45
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable domains, indicating a link farm or SEO manipulation tactic. The presence of the URL 'https://ponafet.ru/wix?keyword=christmas+word+that+starts+with+letter+r' suggests a lure related to Christmas, potentially for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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 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://ponafet.ru/wix?keyword=christmas+word+that+starts+with+letter+r PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458394/normal_60120f2dc0eab.pdfIn PDF document text
    • http://yachts-4-sale.com/counting_numbers_worksheets_for_grade_3gv4uq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460946/normal_60488bf571b82.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/sajonek.pdfIn PDF document text
    • http://uscarinsurance.info/63691349921ddhb9.pdfIn PDF document text
    • http://roman-holidays.shop/crab_rave_saxophone_sheet_musicsj5tc.pdfIn PDF document text
    • https://gisafumeg.weebly.com/uploads/1/3/6/0/136098567/taretumusom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371807/normal_600ccff3ef3a1.pdfIn PDF document text
    • http://datingdate.site/ghatna_chakra_reasoning_book_free_download1c4qz.pdfIn PDF document text
    • https://zizeximafebofiz.weebly.com/uploads/1/3/4/3/134369397/35ac57f.pdfIn PDF document text
    • http://insurancecarusa.com/red_dead_redemption_playstation_3_walkthrough1q6q4.pdfIn PDF document text
    • http://lg-supportteam.com/friedrich_nietzsche_theorytxr23.pdfIn PDF document text
    • https://nerupeke.weebly.com/uploads/1/3/1/4/131483009/7e7a8d9765c8f.pdfIn PDF document text
    • http://usacarins.com/sample_chemistry_lab_report_titrationohgzy.pdfIn PDF document text
    • http://fb-pageunderreview.com/11843296329cx565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474722/normal_603fc1b15405d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_6016e5d663c45.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/68709cea-0356-4e65-9031-d17d20f2fe47/what_is_the_difference_between_ti_83_and_84.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cefc014c-1a6b-4c9f-8933-d8eae3b44d9b/char_broil_grill_grates_rusted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666e7699-d54c-4f29-b724-e13f5aac120a/nijegeritenemirisope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b2c7f8-3191-4ea7-bebe-6a9c1323bd03/diwididefefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bb123f-3c0d-4c9d-aa28-42d83bdc7635/fukefofalawetoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00be7b06-4bdf-413e-8468-494922a7944e/what_causes_high_thyroid_hormone_levels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d61a35b-d22c-4a25-86d2-c15e44a09900/misugupofomidejab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d47e05-7181-4631-8d30-5d60ec372983/romasulopolodalivodid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b0627f-6530-4ce4-8791-1d05e33c517a/25271855608.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_off0000fb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB87 5060 bytes
SHA-256: e6d4bebef6e535a22ab354273918faace30935db150a8da9bc5baddcf815be86
font_01_sfnt_off00010c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C91 10928 bytes
SHA-256: 75fb86c7749f0fd1ba63a92f6a5ad508d7dab8e5a9413cec4cf2995c807558e3