Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61e0dd37a942d8f…

MALICIOUS

PDF

111.4 KB Created: 2021-04-05 23:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 549bae121cfd68c69f4df8da5dde46b4 SHA-1: 6423c35db58ed61ab9bad11f8348b12f26f51eed SHA-256: b61e0dd37a942d8fc0db9c14e374e8835914fcc9bc805271e9bd039f76544118
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=yamaha+ysp+2200+manuale
    • http://idealicaitalia-ufficiale.site/is_nesquik_strawberry_milk_good_for_youtoi8e.pdf
    • http://damita.fun/alienware_17_r2_user_manual6hsr5.pdf
    • http://bumosid.getenjoyment.net/21848527739.pdf
    • http://xebubux.sportsontheweb.net/61341881529.pdf
    • http://all-system7.work/fallout_4_companions_react_masterlistxu0bt.pdf
    • https://sorimuzumetig.weebly.com/uploads/1/3/4/5/134519591/519e8a1c63bf70.pdf
    • http://uspeh.icu/tuborasivuxukenogekulebaf4ygn.pdf
    • https://kodavagimiwebod.weebly.com/uploads/1/3/5/3/135346487/4193025.pdf
    • https://segoluremu.weebly.com/uploads/1/3/2/7/132740478/bujonaxipopotiw.pdf
    • http://momentikshop.space/char-broil_4-burner_propane_gas_grill_with_side_burner318xc.pdf
    • https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/ratizefizuwe_kogigakeg_meneboxebo.pdf
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/075c1153de97ac.pdf
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/patali.pdf
    • http://ruwufuwetoj.mygamesonline.org/63742349365.pdf
    • http://bigezidara.mypressonline.com/median_nerve_gliding_exercises.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://37459de8-d961-4a2a-897a-801dad55dcfc.filesusr.com/ugd/1395e2_2ec0adbaa1b34a30b08a57b913ba4998.pdf?index=true
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_4fea8f785f85439eba1a7ccaed01b3e0.pdf?index=true
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_c762e06a5d9644c983232fb5d1cd8a1a.pdf?index=true
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_8475dedc19cd4bac8daa8e372550be92.pdf?index=true
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_9327f0933ac542469a7d0226404e327e.pdf?index=true
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_bb91d5d843734710b90642841f86ca78.pdf?index=true
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_47a12caad373445b9dfd6264cacea231.pdf?index=true
    • http://moxosutemow.onlinewebshop.net/73012720181.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
    • http://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f94.bin
1afa4437a61a4825166009bb9a24600fdc65493d775ca40890b97fe950061b81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F94 4944 bytes
font_01_sfnt_off00014034.bin
5142164a43c41e8081ef9701c6d863c601d8fe3f59013466197a8c82e949467a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14034 11244 bytes
font_02_sfnt_off00016021.bin
e97459c4fef060b0b6d142f7e76d35ae896356ec67e6aec4ad7864d7f7fe2272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16021 12364 bytes
font_03_sfnt_off000189bc.bin
2ffe0065ad8a4efff0e8f9db3fffdc285a08b07fe6b7db3d69aed5e68b96de1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x189BC 16248 bytes
font_04_sfnt_off00019f0e.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19F0E 4324 bytes

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