Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1805982539e403…

MALICIOUS

PDF

80.6 KB Created: 2021-03-26 07:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 639c50d70cddc7755688c9fa73e11b20 SHA-1: e235622ab4c48170aa18635f96fd6fcca7f38972 SHA-256: 0b1805982539e403562bab9ffd09d22a15b03b0409c046f9ee9ebc238329022b
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO abuse for traffic redirection. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing or a trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be a precursor to delivering a password-protected payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://resalured.ru/wix?keyword=100+percent+free+ringtones
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/6e70cfd9.pdf
    • http://pokupka.space/is_hbo_max_available_on_amazon_fire_tvfqtim.pdf
    • https://gemaxapofa.weebly.com/uploads/1/3/2/6/132681544/886591.pdf
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/a87e740b.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/8236301.pdf
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/xidopoxabevelow.pdf
    • https://nofabirudop.weebly.com/uploads/1/3/4/4/134455392/d4cd6bf6.pdf
    • https://static.s123-cdn-static.com/uploads/4476767/normal_5fc812875f20d.pdf
    • http://lajafago.medianewsonline.com/85956217899.pdf
    • http://cheatyou.site/rofemikekufulilan1klic.pdf
    • http://dulugidi.iblogger.org/68148450386.pdf
    • http://aicberg.net/jigatutugegotikoxaketexaj5nwza.pdf
    • https://cdn-cms.f-static.net/uploads/4405430/normal_6014c814361b1.pdf
    • https://metasabuvaro.weebly.com/uploads/1/3/2/6/132681671/6ee0a4d390afa47.pdf
    • http://kakorixow.mygamesonline.org/autocad_inventor_fusion_2020_tutorial.pdf
    • http://sy0n.icu/85376212698fd8p2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bajobakokela.epizy.com/gugaxo.pdf
    • http://dalitixusukewo.epizy.com/logitech_surround_sound_speakers_z506_no_power.pdf
    • http://sawurawefivovo.myartsonline.com/convert_kindle_ebook_to_online.pdf
    • http://rijonitapadon.myartsonline.com/appraisal_report_sample.pdf
    • http://gajutar.onlinewebshop.net/66707160750.pdf
    • http://masusekokuberex.rf.gd/speed_queen_washer_model_tr7003wn.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca4.bin
ec2485236188cb689c443750e69574870eaba71bd7d3739c46f13c1dfa584685		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA4 5040 bytes
font_01_sfnt_off00010de9.bin
b4a14029ba19adf22356829d619925a1d4f822ef4108bd75d72fa9fc0f86d0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE9 11384 bytes

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