Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae9491b40da97cb…

MALICIOUS

PDF

79.1 KB Created: 2021-03-28 02:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d8bdc7f50faa6446f1b2dd752c850835 SHA-1: 5311ccff7854541900c5247b9bc21333754a8399 SHA-256: 1ae9491b40da97cb82dfdf30bba68b9b69162d78977bd67944ee1f9434ef8585
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains a large number of external links, many pointing to PDFs hosted on S3 buckets, suggesting a link farm or redirection mechanism. The embedded URL 'https://kuzutuzo.ru/123?utm_term=angular+7+template+free+github' is presented as a lure, likely to disguise the malicious intent of directing users to a network of potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/123?utm_term=angular+7+template+free+github PDF link annotation
    • http://levantemosaic.com/pofedefewokurimx5ws0.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/7wjdib4/strategyzer_canvas_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/5ggYkRv/14868828003.pdfIn PDF document text
    • http://community-day.ru/mevezkefh2.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/aghoifF/fidget_spinner_island_animal_crossing_new_horizons.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/fotepopunaj/zotuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/41899450630.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/15233749445.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/fuel_economy_guide_epa.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/the_book_of_yes_free.pdfIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_5bae63f2663244eb955ff40feb3f8f89.pdf?index=trueIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_f1a8e18d562e45268d37200b89378247.pdf?index=trueIn PDF document text
    • https://b6d28218-96ba-4f98-b9c1-0d78b4e6fe84.filesusr.com/ugd/47aa88_5beee13319e547b38e7e2222336f297f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusagi/maxepazud.pdfIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_0a0c91fc831748eb924743292ff4533d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajibile/xunodamisoriniwuweroxipa.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/mupokigatozamokakupebaloj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 5120 bytes
SHA-256: e5e48fa709b6d2576ae36468fa67d02a7234c7fdc68dd426b6a444708fa8b637
font_01_sfnt_off0000ec7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 3120 bytes
SHA-256: c9b5c4904a063eda2fd006e21c0d11b7d9e09ba17605c18bcc17455d537c1e8f
font_02_sfnt_off0000f901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 11116 bytes
SHA-256: 9770eef42c4432e433eb8d76ed7ac63485084954cdce6394cf87a03397471820
font_03_sfnt_off00011f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F29 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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