Malicious PDF — malware analysis report

Static analysis result for SHA-256 034071175dcd6136…

MALICIOUS

PDF

106.0 KB Created: 2021-03-17 18:25:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4e273fb625c79ff2660e30868a0343be SHA-1: 084ab1ad20df76c74a05d75c9b1f0db88110c353 SHA-256: 034071175dcd6136201eb3fadf61a164d563a88d3da97983fa62433e12c76d3e
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 are SEO-optimized and point to other PDFs, suggesting a link farm or redirection mechanism. The primary URL, 'https://jottigo.ru/award?keyword=smoke+detector+honeywell+pdf', is presented as a search result, indicating a lure to a potentially malicious site. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=smoke+detector+honeywell+pdf PDF link annotation
    • https://gepufefodu.weebly.com/uploads/1/3/4/0/134013389/8196227.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/hjdSfeN/2337482473.pdfIn PDF document text
    • https://xaruxetadelu.weebly.com/uploads/1/3/4/4/134478950/9631345.pdfIn PDF document text
    • https://dowoxadi.weebly.com/uploads/1/3/1/3/131380004/felofujok_baxubonunigavo.pdfIn PDF document text
    • https://xoxajunun.weebly.com/uploads/1/3/4/3/134351876/6091270.pdfIn PDF document text
    • https://govipilod.weebly.com/uploads/1/3/4/6/134651664/fuwekitiboxi.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/hctifii/14515712559.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/midizaxopazeji/11059539662.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/bonobexu.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/apk_whatsapp_untuk_tablet_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/acc_aha_hypertension_guidelines_2017_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/68106495476.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/20558133246.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/fabemuso.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/fufavenalakilub.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/free_bible_for_pc_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/leap_ballerina_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/essentials_of_corporate_finance_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/a_christmas_carol_play_script_for_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/61992810702.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_off00015ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED6 5368 bytes
SHA-256: 9fd9b5939bbb0de2c49d63420243a2074ced5dcc4cbea7e4ac1822d029471f68
font_01_sfnt_off00017111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17111 12036 bytes
SHA-256: bee695f0cd45911c7761d498fbaff95102b0d26c89672ba63c74503a5e36a9f6

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