Malicious PDF — malware analysis report

Static analysis result for SHA-256 d807f6d1418f36ce…

MALICIOUS

PDF

120.1 KB Created: 2021-03-20 22:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 628a0cae8a2ca2aabd6436fec81dc470 SHA-1: 19f7b9b40cf888bcdaf31f31290697cd767b84ff SHA-256: d807f6d1418f36ce5494381417ee1fb9f036d31f016b414f7de5cf3b0a1b826f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate this PDF is malicious, likely a phishing or trojan distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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
  • 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://golowaki.ru/award?keyword=peer+attachment+theory+pdf
    • https://cdn-cms.f-static.net/uploads/4426682/normal_60537d38dce35.pdf
    • https://cdn-cms.f-static.net/uploads/4419452/normal_601e10eb9764c.pdf
    • https://cdn-cms.f-static.net/uploads/4501041/normal_601b57db22eff.pdf
    • http://tidirakozodawon.getenjoyment.net/tuveb.pdf
    • https://static.s123-cdn-static.com/uploads/4385434/normal_5fc968783cd9a.pdf
    • https://static.s123-cdn-static.com/uploads/4497369/normal_5ff4a26a6a42f.pdf
    • https://cdn-cms.f-static.net/uploads/4490529/normal_60254b37c69c0.pdf
    • https://static.s123-cdn-static.com/uploads/4419630/normal_5fcf8a2418e65.pdf
    • https://cdn-cms.f-static.net/uploads/4366336/normal_604777bd13723.pdf
    • http://buwovavozu.getenjoyment.net/kunojujepibabuzikaxum.pdf
    • http://it50disconto.pro/87829668714zlyqh.pdf
    • http://lordtrans.ru/2017_dodge_challenger_gt_awd_manualbcncl.pdf
    • http://uscreditinquiry.info/92457616462ds0pl.pdf
    • http://rulabepotinujeb.mypressonline.com/xaniwedabibatimigi.pdf
    • http://apsdd54gfv.xyz/23951458711y8twa.pdf
    • http://wisitens.online/59320874082vf6vx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nunakixuma/70620745158.pdf
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_985d23cd1616469493375fd2c493e8f4.pdf?index=true
    • http://vumamuv.myartsonline.com/zedax.pdf
    • https://s3.amazonaws.com/pokixovuxik/57955413107.pdf
    • https://d926c97b-7f3b-4ec8-a52a-318bcb589338.filesusr.com/ugd/120f26_343c262177ac4543bfb504b683aa7a79.pdf?index=true
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_cd0a9d6241c7483e850ff73dd7efa23e.pdf?index=true
    • https://s3.amazonaws.com/sirilagewuga/juwuzudib.pdf
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_9d35fe051adc430380d290f80d2129a5.pdf?index=true
    • https://s3.amazonaws.com/povelenavuviw/pokemon_battle_revolution_online_android.pdf
    • https://s3.amazonaws.com/fotepopunaj/xofonewefipavejifuseku.pdf
    • 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_off00019529.bin
c9feb53eb8f94e156655df8c0d609d0f435a3657f970c0fa8053480aafd5e327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19529 5288 bytes
font_01_sfnt_off0001a708.bin
e41d67209ed8d339f83845463d59cd16b8c9796ce69bb1515cdea783ddc91f1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A708 13592 bytes

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