Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efe69b20dabf820…

MALICIOUS

PDF

76.6 KB Created: 2021-03-31 03:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf34c4a12cf36381f727bc7894ba36a6 SHA-1: 16c813479dd02fb6e1d49acc6058c05926183441 SHA-256: 1efe69b20dabf8207d4774bb727fac732ee31b66ddbdcfa789bdefb0f2fb15f0
196 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm, suggesting a phishing or SEO poisoning attempt. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent. The document body, though partially corrupted, contains a URL that appears to be a lure for downloading an application, likely a pretext for delivering malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://botokaw.ru/wix?keyword=download+traffic+racer+mod+apk+2.5
    • https://cdn.sqhk.co/nujizeres/IjcGwjj/word_meaning_master_builder.pdf
    • https://cdn.sqhk.co/zugeketinog/gjyIWhg/music_equalizer_online_iphone.pdf
    • https://cdn.sqhk.co/xalurubizud/fKjbWgf/pogamo.pdf
    • https://cdn-cms.f-static.net/uploads/4528959/normal_6040fc9161fdd.pdf
    • https://cdn-cms.f-static.net/uploads/4412387/normal_601129dfea2e8.pdf
    • http://juzezudusota.mypressonline.com/zanajajujokokuresutilu.pdf
    • https://static.s123-cdn-static.com/uploads/4387054/normal_5fe3f14bc9f94.pdf
    • http://mareson.getenjoyment.net/51778022480.pdf
    • https://cdn.sqhk.co/jirudumom/gfCiaWL/kung_fu_panda_3_runtime.pdf
    • https://sufidubiziden.weebly.com/uploads/1/3/4/7/134732268/bajesukevafikexave.pdf
    • https://lexilovomab.weebly.com/uploads/1/3/1/4/131452944/6560018.pdf
    • https://malitorenifavo.weebly.com/uploads/1/3/4/0/134017021/660a37.pdf
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/1a07ea9ed8b3.pdf
    • https://malibuvebejonab.weebly.com/uploads/1/3/4/5/134524684/7578391.pdf
    • https://cdn.sqhk.co/xazururoxe/jijhQsn/33151795509.pdf
    • https://static.s123-cdn-static.com/uploads/4496580/normal_60015fd95093f.pdf
    • https://gonedosi.weebly.com/uploads/1/3/4/7/134730609/09218a6a39e.pdf
    • https://cdn.sqhk.co/tikikizeveni/ghcjbTJ/loruzobigi.pdf
    • https://peziwavadeba.weebly.com/uploads/1/3/4/3/134313506/pigumamifomo_jizakux_ruxafojewagen.pdf
    • https://cdn-cms.f-static.net/uploads/4365619/normal_60333fa544173.pdf
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/9196450.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e99c.bin
205c33ad6ab7055b73535ed3e22aea891a5a7cc60b14bd2acf0e9d816576d263		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 5564 bytes
font_01_sfnt_off0000fc9e.bin
8df9b97d07e25ef2b746219ff7e4479d582d3f30a7e0cbed60c41117d1ed81c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9E 12464 bytes

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