PDF malware analysis — malicious · b8cdcba342180946

MALICIOUS

PDF

125.2 KB Created: 2021-03-10 12:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17

MD5: 9ddb70ed1f64560d47affbca22ea3537 SHA-1: f2a857216f36a9ade4a4583f5321402c76bc9d8d SHA-256: b8cdcba3421809464ac175ccd005834abbdd902cb9b3eb160be52605b11fe07c

164 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 intent to distribute content or phish users. The presence of a 'Download' button lure and ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. The embedded URL 'https://mezovuduw.ru/wix?keyword=myprogramminglab+answers+python+chapter+7' is likely a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

Heuristics 6

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://mezovuduw.ru/wix?keyword=myprogramminglab+answers+python+chapter+7 PDF link annotation
- https://cdn.sqhk.co/wujugojuse/uhdRggo/40009018265.pdfIn PDF document text
- https://cdn.sqhk.co/tigixexaxi/hbPiggf/lelarajas.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393521/normal_5fd2740658006.pdfIn PDF document text
- http://mojenotivoriwur.22web.org/cracking_coding_interview_python.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417214/normal_5ff21fb4824d9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402000/normal_600e397c0f618.pdfIn PDF document text
- https://cdn.sqhk.co/muwanije/qkhficu/31887428024.pdfIn PDF document text
- https://cdn.sqhk.co/bowewulaxam/eQijHjg/xbox_one_gaming_monitor.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/mejigavukolu/mijaful.pdfIn PDF document text
- http://zotuxegusam.epizy.com/how_fast_does_a_250cc_quad_go.pdfIn PDF document text
- https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_6d881d1b73d74583b25e34d922a9f8df.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/woberiz/rewabager.pdfIn PDF document text
- https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_5fde0e6cf3834cd1a276396b10ec2c26.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xokebore/blogspot_templates_free.pdfIn PDF document text
- http://dofumuligo.rf.gd/zifetegosifizuzizofijuj.pdfIn PDF document text
- https://s3.amazonaws.com/fukepez/71069229887.pdfIn PDF document text
- https://s3.amazonaws.com/penefelomiju/28210781636.pdfIn PDF document text
- http://govuwetubor.epizy.com/lagu_iwan_feat_amelina_yang_tersayang.pdfIn PDF document text
- https://s3.amazonaws.com/tokatefozude/11740691150.pdfIn PDF document text
- https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_999ad2a6b8c74b78aba8ef7a0a9f2fee.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sepawi/19703294154.pdfIn PDF document text
- https://s3.amazonaws.com/nazekisigiduz/85922271830.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000187e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x187E9	5764 bytes
SHA-256: `aa652e60ac2c52b6ea4ce99f0ae72595e908b17fe0175cee2114bfdfc76296d8`
`font_01_sfnt_off00019b89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19B89	2024 bytes
SHA-256: `a511fb262e2f240b0cc62b800179189f1c69c7b4d67d938f9bc0c5e12ef74554`
`font_02_sfnt_off0001a51e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A51E	13168 bytes
SHA-256: `8145b06d732b40e23957baeabfef5ecc2fec04d7d725d4f1ac76229744d2a932`
`font_03_sfnt_off0001d0b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1D0B0	16384 bytes
SHA-256: `226a8e4e528c820945b068501793868e9b71e899c703a7ad804f9a2f424011a5`

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