Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1a91345927e3a8…

MALICIOUS

PDF

92.0 KB Created: 2021-02-13 05:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b34e890082cec381b4193e3188562b19 SHA-1: 4d812d4ecb1edc5ad86877d1dc610bceb40f563b SHA-256: aa1a91345927e3a82da10319c3edb2381d160e3b409c92741069c98819a1d648
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm attack. It contains numerous external links, including one to 'jacksth.ru', suggesting an attempt to direct users to potentially malicious content. The PDF's structure and the presence of external links indicate it's designed to drive traffic to a network of sites, likely for SEO manipulation or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://jacksth.ru/wix?keyword=fruit+loop+beat+maker PDF link annotation
    • https://nebomigefut.weebly.com/uploads/1/3/4/3/134359696/1700764.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458615/normal_5ff7ab99185af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481059/normal_60232f201dcfb.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/topisozojujuduto.pdfIn PDF document text
    • http://gewebufokorilu.iblogger.org/bacterias_patgenas.pdfIn PDF document text
    • https://mazegiwekode.weebly.com/uploads/1/3/4/5/134529082/zelepusupofo-rafafewimupi.pdfIn PDF document text
    • http://xijogeziku.66ghz.com/60922129385.pdfIn PDF document text
    • https://rabibenexu.weebly.com/uploads/1/3/5/3/135319922/68fe75.pdfIn PDF document text
    • https://dusitibepilezu.weebly.com/uploads/1/3/1/4/131437978/jajugipuvumokasarasi.pdfIn PDF document text
    • https://nuxogisufebodad.weebly.com/uploads/1/3/5/9/135965827/7d659c.pdfIn PDF document text
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/1570010.pdfIn PDF document text
    • https://niridugur.weebly.com/uploads/1/3/5/2/135296669/6b6a8.pdfIn PDF document text
    • https://batusuxejodasav.weebly.com/uploads/1/3/1/8/131857782/dobivuxobomus-tunefinitupiza-majaji-viruvozufi.pdfIn PDF document text
    • http://figojusu.iblogger.org/michigan_child_protection_law_mandated_reporters.pdfIn PDF document text
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/9207301.pdfIn PDF document text
    • https://demuvejujewik.weebly.com/uploads/1/3/4/0/134042515/vifuruvaj-kowir.pdfIn PDF document text
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/mabuwu.pdfIn PDF document text
    • https://xorowime.weebly.com/uploads/1/3/5/3/135307705/528696.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sukedil/vulegavunuj.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/freelance_graphic_design_contract_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/game_booster_apk_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/53699486556.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/king_platform_bed_low_headboard.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_off00012dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC8 4944 bytes
SHA-256: 73da33e30d141788c66710d14cb78b930a06fb9227c9f78ccd3cf450c0a1a5d4
font_01_sfnt_off00013e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E82 10532 bytes
SHA-256: e87409d20dc095afb94bfc18f06144cc84c51ef0f41f8a4b32e8f5fab791e680

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