Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbaff7cd397199e…

MALICIOUS

PDF

76.9 KB Created: 2021-04-22 11:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c19777ad8245dba4891abd5c8336d945 SHA-1: 283ef3f24aeea201b332b6ff28efb92f2ba4c4cd SHA-256: 2bbaff7cd397199ed5d166ca037f6b95f1150dd3ba7aab9d45328115dbe9adf4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URIs suggests an attempt to redirect the user to malicious content.

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://jumiwimov.ru/strik?utm_term=abb+acs800+multidrive+manual PDF link annotation
    • http://digitalmicroteter.xyz/damogajoxumoribumedekoz7ak54.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/5431430.pdfIn PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/7e745938.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/bleach_vs_naruto_3._2_pc.pdfIn PDF document text
    • https://surevasod.weebly.com/uploads/1/3/1/8/131856145/faruketesoronep.pdfIn PDF document text
    • http://supportcopyright.net/ascending_and_descending_order_worksheets_for_grade_2m0q0f.pdfIn PDF document text
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/pirelukilujo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dodozos.epizy.com/candy_crush_soda_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/yangmingshan_national_park_map.pdfIn PDF document text
    • http://baverasoge.epizy.com/xidusofixasorum.pdfIn PDF document text
    • http://lixutepojux.rf.gd/autodesk_vault_basic_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/what_is_considered_bad_conduct_discharge.pdfIn PDF document text
    • http://zopimejumujodeb.rf.gd/ledavataluvi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/format_date_anglais_lettre.pdfIn PDF document text
    • http://bilunijo.epizy.com/xikekovaz.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/saxopa.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/food_menu_template_photoshop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/relitozuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE2 12104 bytes
SHA-256: 966443cd832f25faeb4a8721e744965cfe374c9e6d449093c66a454b0e666f9f
font_01_sfnt_off0000f272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF272 5608 bytes
SHA-256: 600df356db2b38abd8fcc9be577840f0ce6d421e97ad06607aa6ba57ddd3b95a
font_02_sfnt_off0001056e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056E 9592 bytes
SHA-256: 26284e3291832d1b90d43f45e9725e715514a015a61a306b3f9c5ab514072511

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