Malicious PDF — malware analysis report

Static analysis result for SHA-256 e788c46e78b30446…

MALICIOUS

PDF

75.7 KB Created: 2021-03-20 07:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 080686c5dd655da2631889b1b857721b SHA-1: b2687bf45aac2a6044307e578409ecc88397ff28 SHA-256: e788c46e78b304467027967021b5ed776f20ddb0684abb056b8e3843a64319cf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO abuse for malicious purposes. ClamAV and ML classifiers indicate malicious content, specifically identified as phishing or a trojan. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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://jottigo.ru/award?keyword=brain+teaser+worksheets+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408875/normal_600921f929cdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470964/normal_604797276be59.pdfIn PDF document text
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/1938600.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/e8b847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411273/normal_603b6cbd462cb.pdfIn PDF document text
    • http://salopkisa.website/7556336676507lnp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_602b12fc0a93f.pdfIn PDF document text
    • http://sallles.ru/domino_c7_printer_manualbxrxm.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/laturezcc9x.pdfIn PDF document text
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/9129195.pdfIn PDF document text
    • http://sun-italy.space/rental_agreement_template_docvrhj3.pdfIn PDF document text
    • http://1xbets-reg.site/745142793354jbd6.pdfIn PDF document text
    • https://gugibutuxu.weebly.com/uploads/1/3/2/8/132814167/xigifep.pdfIn PDF document text
    • http://axecheat9.xyz/66202294763z9nan.pdfIn PDF document text
    • http://topsalon.xyz/2019_general_knowledge_questions_and_answers3zwxy.pdfIn PDF document text
    • https://xexigajusotojuz.weebly.com/uploads/1/3/1/6/131606060/lulumixagedozanigeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500877/normal_604173ecb096a.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://s3.amazonaws.com/kukazowox/what_is_the_most_popular_german_shepherd_dog_name.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/share_jesus_without_fear_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/how_to_connect_panasonic_phone_to_bluetooth_headset.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/apa_format_cite_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/jay_z_decoded_cover_art.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/36077984454.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/flocabulary_answer_key_unit_3.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/32705723175.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 5088 bytes
SHA-256: db750c92ef930608b98367cd6dbfe79c4db578ed8315e748ab6f2a6e63bbbb04
font_01_sfnt_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 10648 bytes
SHA-256: c4b28cd620007426aaef2467fabc5735ec7c2c5917684ad22b70efed6322c67f
font_02_sfnt_off00011328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11328 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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