Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bc575b2db56182…

MALICIOUS

PDF

45.8 KB Created: 2020-10-27 00:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 304ec8c654c6866d19afd88fd9879c2c SHA-1: 90b4e3bb77e9d244bef5aaf995d41cd86479c3d7 SHA-256: 62bc575b2db56182deb0374a10b9a054f784fff66db39fc4db95f267e607b3e9
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?keyword=high+school+student+information+sheet+template In PDF document text
    • https://dotigima.weebly.com/uploads/1/3/4/4/134404546/8514791.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/duxezunufisevozatej.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/vikusozukunuwut-vakax.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/vonemisakexexim_kufagibopolinu.pdfIn PDF document text
    • https://xuxewisi.weebly.com/uploads/1/3/4/2/134235501/tibakelafeje-parasan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8e04c935ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425211/normal_5f974e53a6787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8a384896b41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5f87d37faa83b.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/suxiweke/fozemasakoxoko.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/disopatenefo.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/30931056608.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/kumpulan_paribasa_sunda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2774c4c-ef19-40ce-883d-2454c58243c2/powerdirector_pro_full_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/fominekukuvonokaginimiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/carbanion_reactions.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/23788229605.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/7837500631.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/37756050670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8650/6912/files/23286187445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/plants_vs_zombies_2_free_download_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/98101491322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/8824/9500/files/87211377529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9363/2196/files/bemetagudetipotimoxi.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_off0000725a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 5528 bytes
SHA-256: 24ff393d0d1755e0c1eeb6123f9e6176ac03582ade9793b0f8c6afc030aff552
font_01_sfnt_off000084f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F5 10616 bytes
SHA-256: 2f70cc13dd039e75b14f1947a13361345251a262ef56c8db2c3dff00442461f4

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