Malicious PDF — malware analysis report

Static analysis result for SHA-256 6383abb07cbd59dc…

MALICIOUS

PDF

77.0 KB Created: 2021-02-16 21:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a13e174e192a390b98991f04340c8ef1 SHA-1: 220c14edff279739849545085f0da86dce9e5618 SHA-256: 6383abb07cbd59dcd4658efed67105a424dfaccf73eec0a810cf03dae6f219d5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs with numeric slugs, indicative of a link farm or SEO spam campaign. The primary URL, https://jottigo.ru/123?utm_term=how+to+connect+sennheiser+hdr+175, suggests a lure related to product support, likely leading to further malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=how+to+connect+sennheiser+hdr+175 PDF link annotation
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/ed113ef81a4.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/xofipuv.pdfIn PDF document text
    • https://nanexore.weebly.com/uploads/1/3/5/3/135351495/bitolubodewefafuviri.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/1343015.pdfIn PDF document text
    • https://cdn.sqhk.co/sawapevodef/gBeighi/color_fill_3d_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371246/normal_5feb7955d4a0e.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/jejBM8d/video_live_wallpaper_pro_apk_1._0_1.pdfIn PDF document text
    • https://xuzuvakewose.weebly.com/uploads/1/3/1/6/131637797/kikis-jagapave-kinupajeret.pdfIn PDF document text
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/6946167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412584/normal_6003c304ea490.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/iaGBJYJ/razagirijaloluvoketaduwo.pdfIn PDF document text
    • https://kololeranazi.weebly.com/uploads/1/3/4/5/134583506/1449664.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/dazemi/48529340577.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/maai_teri_chunariya_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/77364406592.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/concept_of_break_even_point.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/decimal_to_binary_conversion_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/handwriting_without_tears_letter_formation_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/sarkari_result_dsssb_ldc_answer_key.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_off0000ef22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF22 5092 bytes
SHA-256: 9a1bdcf0e4c4cdc1e55298e4271c8ae9272b2ad6841cc6742f3e1392e9a0d303
font_01_sfnt_off00010092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10092 11688 bytes
SHA-256: 9dea1f9b3c88952892759bb747ea2e380d23128dee345a1a21cbb98c11c9b6f3

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