Malicious PDF — malware analysis report

Static analysis result for SHA-256 178bb39e686931ca…

MALICIOUS

PDF

121.2 KB Created: 2021-03-31 13:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaf184356c59810e715e71fd27b3f14c SHA-1: 7bb9f356b3a33bab2e96d880b2db3474d62ba432 SHA-256: 178bb39e686931ca87ccef784d93a45d0778cc481fb05a0b582a14eab6815f16
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of links intended to manipulate search engine results or distribute malware. The ClamAV detection and ML classifier also indicate malicious content. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://soxebez.ru/wix?keyword=titration+practice+worksheet+answers
    • https://moraraxewurazi.weebly.com/uploads/1/3/4/0/134042425/wurafi.pdf
    • http://vilopeg.xyz/306054251335gjei.pdf
    • http://lnstagramservicecopyrights.com/nichiren_buddhismcxd7m.pdf
    • https://sabutiwageb.weebly.com/uploads/1/3/5/9/135992853/7782746.pdf
    • https://mogasijukunuv.weebly.com/uploads/1/3/4/0/134042787/fowavavudivu.pdf
    • https://mogarujatokeduw.weebly.com/uploads/1/3/5/3/135324664/bolujaganabifuzewavu.pdf
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/topazelelisibeb-lemos-buruvazit-xipogeba.pdf
    • http://fewafef.iblogger.org/mendelian_genetics_worksheet_answer_key.pdf
    • http://igcopyrightclient.com/tadegalunotuzijaparegulivqsubs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sesisat.epizy.com/fosadif.pdf
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_c325fb2cc7cd4848881c4c5972e8fa91.pdf?index=true
    • http://gugefojekasarul.epizy.com/65466852312.pdf
    • http://tupikodufalapa.epizy.com/93544205902.pdf
    • http://joxumokuri.epizy.com/90052707214.pdf
    • http://wamebebubo.rf.gd/jack_reacher_full_movie_stream_free.pdf
    • http://silimafimutoj.rf.gd/64839737315.pdf
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_e5473c17b7094ee48a33543ac96b0053.pdf?index=true
    • http://barazaduxobuta.epizy.com/33069167571.pdf
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_e7fc73469e4144faa6cea97355356a7f.pdf?index=true
    • http://xubotosojoruto.epizy.com/24270093641.pdf
    • https://712e085e-8422-4094-ae2e-709d430f1fc9.filesusr.com/ugd/bf8edb_553141a7745f4f1db81e4dc91d3fe4c7.pdf?index=true
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_484a3fa255fe48178109cf87d896125b.pdf?index=true
    • http://ponusiniwanus.epizy.com/dexipemex.pdf
    • http://demuwesax.epizy.com/gemigewipazo.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001451b.bin
bc482bd9c32781595dceeb0c778a5e83f40d4a22f3d4a7ea670147ce79bd3350		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1451B 6512 bytes
font_01_sfnt_off00015507.bin
5c2c0a0690bca95eab26f28177cfa90694668e2eaaa8fd2af6e21faef65c2078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15507 4036 bytes
font_02_sfnt_off0001634a.bin
d668ce95c25ee30acf747b76dd4a2c348659e0408acaaac3e6c429f9ca1f8a13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1634A 5096 bytes
font_03_sfnt_off000174ad.bin
04eebf3e27716179de9b8656819216a46f39a54c2afaa20f598d366d4e7bcca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x174AD 18048 bytes
font_04_sfnt_off0001ac97.bin
c0bd0f61ef5bd92f5fdd3aab0f70ed629341287e9e722f7abe7b8695798278fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC97 17156 bytes
font_05_sfnt_off0001c5ac.bin
9cf1b43e06d9e9811bb398f8293a982d3b7d7be4b40259ff14aceed85ed73aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5AC 6248 bytes

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