Malicious PDF — malware analysis report

Static analysis result for SHA-256 645567d3f4f50181…

MALICIOUS

PDF

83.4 KB Created: 2021-04-13 00:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9faffaa8a85545f16045fd8b7a5b7e66 SHA-1: 51855114a4d47bcaaf998eec37f5c1676d91332c SHA-256: 645567d3f4f5018128c482176a9e835df7d2c70c53f660db1e251f1d907a7403
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=can+you+nap+in+dailies+contact+lenses
    • http://negimemexib.iblogger.org/chiari_malformation_surgery_scars.pdf
    • https://cdn-cms.f-static.net/uploads/4485569/normal_6027951e79466.pdf
    • https://jowavuzawevubab.weebly.com/uploads/1/3/2/3/132303017/8087061.pdf
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdf
    • http://godisibipuvam.22web.org/atkins_and_depaula_physical_chemistry_9th_edition.pdf
    • https://cdn-cms.f-static.net/uploads/4423154/normal_605034d3e8f35.pdf
    • http://gejudoxe.mypressonline.com/similar_triangles_test.pdf
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/e6559395bd7aec9.pdf
    • https://cdn-cms.f-static.net/uploads/4475194/normal_5fe8928da5d8b.pdf
    • http://pumorux.medianewsonline.com/dragon_age_asunder_free_download.pdf
    • http://balegetiwep.mywebcommunity.org/xanulefaxojomalejosu.pdf
    • http://loduwij.scienceontheweb.net/lost_books_of_the_bible_the_great_rejected_texts.pdf
    • http://mevixonur.mywebcommunity.org/patchwork_board_game_rules.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kizugokofo/multimodal_biometric_system.pdf
    • https://s3.amazonaws.com/mexijegedakol/94662902916.pdf
    • https://s3.amazonaws.com/tixeligufokup/android_10_for_note_8.pdf
    • https://s3.amazonaws.com/zerepuzuze/wikurigamurugijufovovobat.pdf
    • https://s3.amazonaws.com/pibajuwi/what_is_biblical_perspective.pdf
    • http://popofisofol.myartsonline.com/88900092090.pdf
    • http://bodagoge.epizy.com/default_judgement_high_court_template.pdf
    • http://sikanuvigagefu.epizy.com/39396926468.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5c.bin
9540d4c663e03d4d6abe4bfc17d034c09dd664523a111e87e34b6efe69c5e6ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5C 4980 bytes
font_01_sfnt_off00010c69.bin
0048e5aefeb90e4a10bae693623f578a84c1ff175726078aaa6ce88ead3e349e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C69 10496 bytes
font_02_sfnt_off00013043.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13043 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.