Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9cf2be59caa8c7…

MALICIOUS

PDF

83.1 KB Created: 2021-02-19 00:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6399c5857258bde1c424ddbea91cba5f SHA-1: 1a80acb48f1821961743f5f695d130853aa1e7fc SHA-256: ff9cf2be59caa8c772a002bcd0be289c20243c1020ca4a7d91c6ec69849d712c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a malicious SEO or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to potentially harmful 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://jacksth.ru/wix?keyword=bialetti+manual+coffee+grinder+review PDF link annotation
    • http://kokesatur.22web.org/wenapefexi.pdfIn PDF document text
    • http://rotixumuzu.22web.org/mibomoxoruralafi.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/niwimeju-sumuduwa-redefexi-wubefejumejar.pdfIn PDF document text
    • http://xemopubuga.iblogger.org/sowopono.pdfIn PDF document text
    • https://gojufepegaxop.weebly.com/uploads/1/3/4/3/134339744/zinamufujutuketi.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/fikuvine/37280050870.pdfIn PDF document text
    • http://jarifixe.epizy.com/dojipur.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/xijulugumikuxuvigosut.pdfIn PDF document text
    • http://vitewunidamol.epizy.com/56587567103.pdfIn PDF document text
    • http://juvuzonowokogu.rf.gd/mutulonenojalet.pdfIn PDF document text
    • http://ridupokibi.epizy.com/watuza.pdfIn PDF document text
    • http://nuxumejaxumem.epizy.com/fokomudizixuretofejimiz.pdfIn PDF document text
    • http://giduzorim.epizy.com/clarinet_scale_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/sonata_allegro_form_music_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/fix_loose_headphone_jack_android.pdfIn PDF document text
    • http://romutipi.rf.gd/what_is_the_best_study_bible_for_pastors.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_off00010878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10878 5364 bytes
SHA-256: bb454559ea7db2212d119927b796acb73cac6a63e032c37a22d3831e6871a564
font_01_sfnt_off00011ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB9 10644 bytes
SHA-256: fd8c4f33d6a21e2c0e4fc253a1d878857685fd40dfbb88118ff3df2bf6738102

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