Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48e9f0460bbd71a…

MALICIOUS

PDF

77.5 KB Created: 2021-03-01 09:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 411c5cc7ad8fae9f9c0d582e94584e36 SHA-1: bbf998ef071df960068dac39cee986b06e5695da SHA-256: a48e9f0460bbd71a7e32545e42b586c9f73493e17530f9d15dcf810fc0be3e5c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a 'clumsy ninja mod apk all unlocked' download. This, combined with the ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. The presence of a large number of external PDF links also indicates a potential link farm for SEO manipulation or further distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=clumsy+ninja+mod+apk+all+unlocked PDF link annotation
    • https://devuxitimon.weebly.com/uploads/1/3/4/5/134596282/lazobu-fososetafozovo.pdfIn PDF document text
    • http://zootime.store/3117178229844qay.pdfIn PDF document text
    • http://thailandlove.site/2230675474m8noz.pdfIn PDF document text
    • http://gufubugab.22web.org/77978395839.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/gkhbigQ/planet_of_the_apes_last_frontier_ps4_trailer.pdfIn PDF document text
    • http://cloudplay.xyz/can_you_learn_arabic_with_duolingosk0rb.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/Xzgg7OF/free_wifi_near_me_xfinity.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384301/normal_5fe2a093d9a8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_5fde3e90330a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487192/normal_5fce587f1d3dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481513/normal_5fe105aa31a95.pdfIn PDF document text
    • http://inter-kalinka.ru/96425412541s2epp.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/vukagibasemov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425005/normal_5ff62048e968c.pdfIn PDF document text
    • http://pigovaze.iblogger.org/65414505271.pdfIn PDF document text
    • https://tivifetanesa.weebly.com/uploads/1/3/5/3/135347176/vamuvif.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/chinese_language_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutugegazebezop.rf.gd/acrobat_reader_setup.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/senujaredokuwinijimisoke.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_off0000e8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C5 5268 bytes
SHA-256: d41db4ddc96f552a44a4980b5eaf8cf27bf7b29e795379ff74334fd20ee79260
font_01_sfnt_off0000faac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 17096 bytes
SHA-256: c33a50a9022bd29b4f4fad740eabbe8a76328b2d64b60d5eb5b0a2ce9891fb4e

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