Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4232d39d74f0eb4…

MALICIOUS

PDF

77.2 KB Created: 2021-01-11 03:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 50c55e5bc9b4964084831609b97e62d3 SHA-1: 9d6157f5650882a570e216a0115354236b98b3ab SHA-256: f4232d39d74f0eb484adcb4a927cfb7b233ff346ad49dbcf266c29e1e01d8574
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=bmw+s1000rr+2015+service+manual+pdf PDF link annotation
    • https://site-1176165.mozfiles.com/files/1176165/list_of_all_boy_bands_in_the_90s.pdfIn PDF document text
    • https://site-1172347.mozfiles.com/files/1172347/drew_brees_choppa_style_dance.pdfIn PDF document text
    • https://sezariserafuf.weebly.com/uploads/1/3/4/6/134673330/7891f2eb54b53e2.pdfIn PDF document text
    • https://xoretesani.weebly.com/uploads/1/3/4/3/134315313/5584006.pdfIn PDF document text
    • https://site-1241428.mozfiles.com/files/1241428/drdo_ceptam_notification_2018.pdfIn PDF document text
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/bikugomufifovoge.pdfIn PDF document text
    • https://site-1177226.mozfiles.com/files/1177226/kiwazevobejobuf.pdfIn PDF document text
    • https://wabiwuwisurukim.weebly.com/uploads/1/3/2/6/132682822/vudimowej-xemajezuga-nedutigeke-suxerasofag.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/sepawi/fixunumevipugu.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/river_worksheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/mahindra_thar_images.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/piwonasokeketowobuginika.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/elements_of_literature_fourth_course_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/shushing_baby_noise.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA54 5952 bytes
SHA-256: a7fc0f1422cd2b55e16a20c86d9807ba561111c1d66d8d69a3becdbc8191d959
font_01_sfnt_off0000eea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 10524 bytes
SHA-256: 6b0a38d522ad6069a8260042a4a164cd3fe59dde7a737b4ea99fc3ff1d2902a8
font_02_sfnt_off000112f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F7 16060 bytes
SHA-256: c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c

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