Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3d47c20df7114e…

MALICIOUS

PDF

71.8 KB Created: 2021-03-05 05:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: bd84bf0e1ca88eea5eff16ec4bf78ee5 SHA-1: 5d44544d71e927341d5cb95b74249269fe1a7928 SHA-256: 8e3d47c20df7114eb1894ff5a12a346cdf044a659da650fc651f34974e8b05dc
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly flagged it as malicious. The embedded links, such as 'https://soxebez.ru/wix?keyword=frisby+fs-5010bt+manual', suggest a potential phishing or malware distribution vector disguised as search results or document downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=frisby+fs-5010bt+manual PDF link annotation
    • https://wewebaviwipi.weebly.com/uploads/1/3/0/7/130775561/9992940.pdfIn PDF document text
    • http://zdorovienashevse.xyz/dew_point_and_relative_humidity_lab_answers9jhbd.pdfIn PDF document text
    • http://nadahul.ru/free_porn_tushyes8sa.pdfIn PDF document text
    • https://sovipepunufo.weebly.com/uploads/1/3/5/4/135400675/gokalofukiwu.pdfIn PDF document text
    • http://wajulosuju.22web.org/how_to_stop_climate_change_essay.pdfIn PDF document text
    • http://visiblawty.com/94648893921dc51x.pdfIn PDF document text
    • http://my-favshopd.online/karcher_pressure_washer_hose_keeps_coming_offb9xmd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415962/normal_5ff9825d31b4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5fe96264ddb73.pdfIn PDF document text
    • http://specialsale.info/powerblock_pro_50_reviewa1rqx.pdfIn PDF document text
    • http://flylovel.com/techniques_to_activate_the_second_brain2zyoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456982/normal_5ff6656430c58.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://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_9b17443f98e04cb39fb5fb12891d3396.pdf?index=trueIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_748daafe28e44b768f34884bfe6a1c50.pdf?index=trueIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_881f85a25b5d49ea97a871ee91f4b4d2.pdf?index=trueIn PDF document text
    • http://polezupi.rf.gd/maths_board_games_for_7_year_olds.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_04bcd5edb9e3402bb28b7a2f34938f63.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_fab426f6896d4ccba05a0b17169096cd.pdf?index=trueIn 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_off0000d03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03A 5112 bytes
SHA-256: d8c73d2dda8b3d13a2047ac80c33f9210a398ed5eb8d3ca938c08b4105ff975d
font_01_sfnt_off0000e188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE188 10112 bytes
SHA-256: a589f4597a06f689ce00f1f9dac6dc2ecc4d4b955e0db2090b0c562ef1c13336
font_02_sfnt_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333